The whole process of increasing and wires your factory stereo system on your '06 F-150 XLT truck can be accomplished without the requirement of complicated assembly recommendations, as well as specialized instruments. Installing your manufacturing facility device may well confirm necessary to right after eliminating an existing aftermarket stereo, or even right after completing specific dashboard-related repairs.
Elimination
Wide open your automobile's cover as well as detach the black-colored damaging battery wire in the battery's "-" link submit, using a plug and ratchet.
Analyze your lean bezel regarding the stereo handles; individual the actual cut frame in the heart part of the sprint, utilizing a plastic spy application.
Disconnect the actual electric powered connections in the back of the reduce bezel.
Remove the 4 hex-head fasteners getting the existing replacement r / c install equipment, as well as unique music system device, to the center portion of the dash, by using a socket, ratchet and also extension.
Slide the factory device or perhaps put in equipment in the sprint opening up; remove your connectors from the backed with the stereo audio. Place the unique manufacturer or perhaps replacement unit safely aside. Should your automobile highlighted a great replacement stereo system unit, detachment and remove any harness plugs coupled to the car's initial wires.
Installing
Connect the auto's audio tracks fittings on the rear from the manufacturer music system system autel maxidas ds708 professional vehicle scanner; please note how the vehicle-side man wiring connectors are built to join straight to the related women connection factors guiding your stereo audio.
Go the device into the splash starting. Safe your stereo audio towards the center dash place, while using unique 4 anchoring screws, plug, ratchet and also expansion.
Reconnect the particular damaging battery cable television for the battery pack, utilizing a outlet along with ratchet.
2012年12月31日星期一
2012年10月30日星期二
Utilised Subaru Forester Or Used Toyota Avensis - Get The Auto Of your Dreams
You can budget and smaller, and you happen to be nonetheless proud of you get paid for utilised Subaru Forester insurance. Is that the key to know the best areas to not searching for anything to accomplish shopping. You can discover desirable riding high and trustworthy is going to be effectively worth your money and use slightly bit of tough function, and steer clear of your market place lemon pepper.
Can be targeted before starting any portion of this course of action, it's necessary to establish the manufacturer and model of certain interest to carry distinctive storage choices within the used Toyota Avensis this certain. Furthermore, it is actually vital on the basis of the year of your current state of concern along with the car which you are planning to collect and assess the value of your vehicle. In case you don't forget these numbers, will carry out a lot much better in the negotiating table.
Taking your time is extremely essential. Ordinarily, inside the long run, and people that are in a hurry with this purchase, and can pay dearly for it. On the other hand, you may have the ability to stay clear of the options that you simply can use to appear fantastic, and if you invest the time to gather much more proper care will not be effectively in practice. The choice course of action must involve a array of vehicles normally history reports.
Simply kick tires several times, as well as a physical examination, it is actually necessary to go beyond taking a made use of Subaru Forester for any brief spin around the block. You could use the inspection report to make sure that in order to assure that every one of the colors from the outstanding fluid in the appropriate level, and the many operating parts and make sound suitable to you. And may download a lot of the complete list of strategies on the net on what to look for in employed cars, hear.
If you want to test drive automatic, please take it on the highway. This may allow it to attain fast adequate for you to determine irrespective of whether the failure or overheating at it a further way. Dealer you may have not done it just before, and take a good distance when testing alternatives which have been applied for all those who can not be trusted.
If car or truck you're trying to find, you are going to need to have access to a real vehicle accessories and re-adjusted to a particular regular. This may also allow you to customize your choice with other accessories created particularly for the hood, steering wheel cover , steering wheel cover, and selected type cheaply. To go via the manufacturer's internet site, you are able to find regional, authorized distributor.
Can be targeted before starting any portion of this course of action, it's necessary to establish the manufacturer and model of certain interest to carry distinctive storage choices within the used Toyota Avensis this certain. Furthermore, it is actually vital on the basis of the year of your current state of concern along with the car which you are planning to collect and assess the value of your vehicle. In case you don't forget these numbers, will carry out a lot much better in the negotiating table.
Taking your time is extremely essential. Ordinarily, inside the long run, and people that are in a hurry with this purchase, and can pay dearly for it. On the other hand, you may have the ability to stay clear of the options that you simply can use to appear fantastic, and if you invest the time to gather much more proper care will not be effectively in practice. The choice course of action must involve a array of vehicles normally history reports.
Simply kick tires several times, as well as a physical examination, it is actually necessary to go beyond taking a made use of Subaru Forester for any brief spin around the block. You could use the inspection report to make sure that in order to assure that every one of the colors from the outstanding fluid in the appropriate level, and the many operating parts and make sound suitable to you. And may download a lot of the complete list of strategies on the net on what to look for in employed cars, hear.
If you want to test drive automatic, please take it on the highway. This may allow it to attain fast adequate for you to determine irrespective of whether the failure or overheating at it a further way. Dealer you may have not done it just before, and take a good distance when testing alternatives which have been applied for all those who can not be trusted.
If car or truck you're trying to find, you are going to need to have access to a real vehicle accessories and re-adjusted to a particular regular. This may also allow you to customize your choice with other accessories created particularly for the hood, steering wheel cover , steering wheel cover, and selected type cheaply. To go via the manufacturer's internet site, you are able to find regional, authorized distributor.
2012年9月24日星期一
Ways to Reset the Examine Engine Light on an Acura TL
1
Open the fuse panel cover in your Acura. Turn the knob on the fuse cover counterclockwise by hand and pull down on the cover.
2
Locate the substantial input port for the br /> 3
Plug the tool into the port on the fuse panel.
4
Turn the key in the TL ignition to the "II" position, and wait for the "Check Engine" light to go out.
Open the fuse panel cover in your Acura. Turn the knob on the fuse cover counterclockwise by hand and pull down on the cover.
2
Locate the substantial input port for the br /> 3
Plug the tool into the port on the fuse panel.
4
Turn the key in the TL ignition to the "II" position, and wait for the "Check Engine" light to go out.
2012年9月20日星期四
Ways to Reset BMW Service Lights
1
Remove the fuse panel cover and find the 15-pin or 20-pin diagnostic connector.
2
Plug the reset tool into the connector input.
3
Turn the BMW ignition to the "II" position, but do not crank the engine.
4
Wait 15 seconds until all of the service lights have been reset. The indicator light on the should stop blinking at this point.
Remove the fuse panel cover and find the 15-pin or 20-pin diagnostic connector.
2
Plug the reset tool into the connector input.
3
Turn the BMW ignition to the "II" position, but do not crank the engine.
4
Wait 15 seconds until all of the service lights have been reset. The indicator light on the should stop blinking at this point.
2012年8月20日星期一
BMW 325I Fault Code 128 Meaning
Your BMW indicates a code 128 from the engine manage module when the vehicle has failed to reach operating temperature within a set time from start up. This could imply the engine is too hot or also cold soon after a factory-set time frame.
Potential ProblemsYour BMW may not have enough coolant in the engine in the event the car becomes too hot following commence up. The car might also have a faulty thermostat or malfunctioning radiator fan.
TroubleshootingYou must examine the coolant levels as the 1st method of troubleshooting the fault code 128. Replace the thermostat in the event the coolant levels are appropriate. Look at the fan solenoid because the last part of your maintenance. You can reset the code 128 applying a diagnostic laptop. /a>
2012年8月18日星期六
Autologic Scan Tools
Land Rover
This Autologic Land Rover tool is specifically for the Land Rover brand, and it truly is primarily for automotive repair shops and vehicle dealers. This tool is compatible with Land Rover from 1989 to 2010 as of 2010, and it is compatible with this vehicle's air suspension system. This tool options a Auto Configuration File (CCF) function, which lets you alter the settings from the cruise handle, and it comes with Flash programming.
Volvo
The Autologic Volvo tool is compatible with Volvo autos from 1996 to 2010 as of 2010, and it enables you to alter the language of the automobile method. Available languages consist of German, English, Polish and Dutch, and also the tool features a massive screen, which assists you read fault code and program data. The Autologic Volvo tool also enables you to reset your Electronic Throttle Module (ETM) along with the Engine Manage Unit (ECM), which handle how much fuel and ignition timing your internal combustion engine needs. This plan will also show you the diagnostic difficulty codes (DTCs) linked with your vehicle's problems.
Jaguar
This diagnostic tool attributes a touch screen, which means that you can interact with the tool's interface using a stylus or your finger, and this tool also functions Flash programming. You can use this tool to restore your automobile back to the factory settings, including the configuration settings, and you can customize the CCF data. Another feature of this tool is that it enables you to configure your air suspension to fix any difficulties connected with this program. This tool is compatible with Jaguar automobiles from 1995 to 2010 as of 2010.
Mercedes-Benz
The Autologic Mercedes-Benz tool also comes with a touch screen and a menu feature to help you navigate to the correct diagnostic feature, and it comes with a Software Calibration Number (SCN) Coding feature, which enables you to manipulate even extremely new control modules. Other functions of this tool consist of that you can use this to unlock your air bags and code new keys for your car. This tool is compatible with Mercedes-Benz automobiles from 1995 to 2010 as of 2010.
Auto Diagnostic Tools
Inspection Cameras
Inspection cameras are hand-held video cameras that allow the user to determine inside hard-to-reach areas of a . The inspection camera is smaller and situated on the finish of a snake-like structure, allowing the camera to twist and wind its way about and via tight spaces, which includes hoses. The camera also enhances auto diagnostic security because it prevents the mechanic from possessing to reach into potentially harmful regions.
Current Limiter
Auto mechanics generally rely on hand-held present limiters to gauge no matter if a specific electrical circuit within an auto is sapping an excessive amount of energy provide from the vehicle's battery. The system, which resembles a complicated remote control, hooks straight into the auto's electric circuits, like fuse boxes, alternator leads and fan motors. By connecting the device, the mechanic can locate any anomalies inside the car's electrical method.
Code Readers
One of the most commonly relied on diagnostic tools is the code reader. This is a hand-held digital device that plugs directly into your auto and receives a special, standardized code called OBD-II that your vehicle outputs. This code will alert you to any problems with critical systems in the auto, such as engine and emissions problems. By reading the code on an OBD-II code reader, you can determine the source of your vehicle's problems.
Test and Bleed Kits
Car breaks operate using a method of hydraulics. This means that breaks operate using pressurized liquid, which if there is a leak, means that the breaks could malfunction. That is why it is important to use a test and bleed kit to determine no matter whether there is anything wrong with a vehicle's break program. The kit allows mechanics to test the break pressure. If there is an abnormally low amount of pressure, this signals something wrong with the hydraulic break system, and further inspection must be done.
Infrared Temperature Gun
The internal workings of an automobile can generate a lot of heat. However, if the engine generates too much heat, the auto may stall, or worse, present a fire hazard . That is why it is important to test the temperature of car's parts while the auto is running. To do this, mechanics use an infrared temperature gun. By pointing the gun at the interior of the vehicle, the mechanic can safely get a read of the temperature to ensure that it is not above the common threshold.
2012年8月13日星期一
Signs of Transmission Going Bad
Every single automobile, in its life-time, might have experienced a number of or even the some other tranny troubles. If the vehicle can be bound to major tranny problems, the best option would be to change it, yet that would run you a blast. Even so, prior to indication problem can attain to a point of no return, the idea constantly shows a few or perhaps the other signs of transmission difficulty. If you realize these types of indications of transmitting heading undesirable as well as the things they represent, you do have a potential for dealing with the actual transmission difficulty before it's too late.
Indications of Transmission Failure
Managing automobile or transmission troubles oneself might appear to be a hopeless job, in case you see that the vehicle can be supplying you with troubles even though moving things you should understand that a thing can be completely wrong, as well as the issue ought to set immediately. Folks often use their particular vehicles for the smallest distances that additional plays a part in the wear and tear and also dissect from the transmitting system. Indication restore charge may certainly acquire costly also to be certain that you're failing to get overcharged, it's a good idea to know what can go completely wrong using your vehicle's tranny.
Motor Mild
An average powerplant mild examine can serve as an excellent sign if some thing was to get it wrong with the transmitting. The particular check out motor light could flash for a number of causes which might or perhaps will not be associated with indication issues, nonetheless it would be very good if you don't neglect the idea. Fresh created vehicles possess inbuilt devices that notify the particular car's system and also the car owner if anything is definitely completely wrong. In case your automobile is actually suffering from transmission problems these kind of receptors can make way up shake plus warn an individual. You may also make use of a analytical application for a greater examine that may be plugged beneath the directors seat of the a key component solar panel. The device will demonstrate a program code that can high light the area in the vehicle causing the problem. Whether it shows the indication, then it's time and energy to correct a meeting together with your industrial engineer.
Incorrect Response
Your indication device of a automobile is actually specifically designed in order to move completely to another gear each time you modify that, so when this doesn't happen, it's really a certain symbol of transmitting difficulties. Sometimes kit modifications rather comfortably, nevertheless the vehicle nevertheless does not get the actual momentum the designed to acquire. This may happen as a result of over-used clutch i465 black or perhaps a much bigger transmitting problem. Poor result transmitting complaints are quite normal within autos together with automated tranny. An automatic vehicle indication is going inside the "Park" or "Drive" quickly touch if this type of doesn't happen, there may be an issue which has to be categorized shortly.
Liquid Leaking
If you are experiencing transmission liquid leakages inside your automobiles, you will find high possibilities that your automobile can be experiencing transmission issues. Computerized tranny smooth is one area which can be quite necessary for the smooth working of your respective vehicle, which in turn in case identified leaky can easily become a very serious matter. To ascertain if everything is typical with the tranny water, you will need to examine their point out, color and odor. Throughout standard conditions your liquid needs to be red colored and should use a special aroma. Should your transmitting is facing a difficulty, then this color could be african american and you will probably get a using up smell. Examining transmitting essential fluids regarding vehicles with stick shift is not that basic because they should be checked out right on the indication situation. Nevertheless, in the event you even now sense one thing is actually completely wrong it's a good idea to be checked out with the mechanic.
Bashing as well as Trembling
The consequence involving bashing and banging completely depends if you have any manual or perhaps automatic tranny. In the vehicle using stick shift, the car will make a harsh noises when you transfer the. When you've fully involved the clutch i465 black, you shift the tools then notice the mincing noise, you could have a great over employed clutch i465 black that needs a good important substitution. Within programmed microbe infections while you change the automobile gear, you can find large odds that the auto will get a jerk or indication device may wring a little as soon as you change the products.
Indications of Transmission Failure
Managing automobile or transmission troubles oneself might appear to be a hopeless job, in case you see that the vehicle can be supplying you with troubles even though moving things you should understand that a thing can be completely wrong, as well as the issue ought to set immediately. Folks often use their particular vehicles for the smallest distances that additional plays a part in the wear and tear and also dissect from the transmitting system. Indication restore charge may certainly acquire costly also to be certain that you're failing to get overcharged, it's a good idea to know what can go completely wrong using your vehicle's tranny.
Motor Mild
An average powerplant mild examine can serve as an excellent sign if some thing was to get it wrong with the transmitting. The particular check out motor light could flash for a number of causes which might or perhaps will not be associated with indication issues, nonetheless it would be very good if you don't neglect the idea. Fresh created vehicles possess inbuilt devices that notify the particular car's system and also the car owner if anything is definitely completely wrong. In case your automobile is actually suffering from transmission problems these kind of receptors can make way up shake plus warn an individual. You may also make use of a analytical application for a greater examine that may be plugged beneath the directors seat of the a key component solar panel. The device will demonstrate a program code that can high light the area in the vehicle causing the problem. Whether it shows the indication, then it's time and energy to correct a meeting together with your industrial engineer.
Incorrect Response
Your indication device of a automobile is actually specifically designed in order to move completely to another gear each time you modify that, so when this doesn't happen, it's really a certain symbol of transmitting difficulties. Sometimes kit modifications rather comfortably, nevertheless the vehicle nevertheless does not get the actual momentum the designed to acquire. This may happen as a result of over-used clutch i465 black or perhaps a much bigger transmitting problem. Poor result transmitting complaints are quite normal within autos together with automated tranny. An automatic vehicle indication is going inside the "Park" or "Drive" quickly touch if this type of doesn't happen, there may be an issue which has to be categorized shortly.
Liquid Leaking
If you are experiencing transmission liquid leakages inside your automobiles, you will find high possibilities that your automobile can be experiencing transmission issues. Computerized tranny smooth is one area which can be quite necessary for the smooth working of your respective vehicle, which in turn in case identified leaky can easily become a very serious matter. To ascertain if everything is typical with the tranny water, you will need to examine their point out, color and odor. Throughout standard conditions your liquid needs to be red colored and should use a special aroma. Should your transmitting is facing a difficulty, then this color could be african american and you will probably get a using up smell. Examining transmitting essential fluids regarding vehicles with stick shift is not that basic because they should be checked out right on the indication situation. Nevertheless, in the event you even now sense one thing is actually completely wrong it's a good idea to be checked out with the mechanic.
Bashing as well as Trembling
The consequence involving bashing and banging completely depends if you have any manual or perhaps automatic tranny. In the vehicle using stick shift, the car will make a harsh noises when you transfer the. When you've fully involved the clutch i465 black, you shift the tools then notice the mincing noise, you could have a great over employed clutch i465 black that needs a good important substitution. Within programmed microbe infections while you change the automobile gear, you can find large odds that the auto will get a jerk or indication device may wring a little as soon as you change the products.
2012年8月10日星期五
Virtual Tech App Improves Reefer Unit Uptime, Carrier Says
Virtual Tech, a comprehensive diagnostic application that continually monitors trailer refrigeration unit operation to help avert potential system problems, is now part of Carrier Transicold's APX control system, the company announced.
The new application continuously monitors the operation of all unit components - refrigeration, mechanical and electrical - as well as the APX control system itself.
"The Virtual Tech application is like having a ride-along service technician watching the unit's performance," said Mark Fragnito, Carrier Transicold's product manager, electronics . "It helps take the guesswork out of refrigeration unit service, making troubleshooting easier and faster, and improving equipment uptime in the process.
"It's a tool that will be well received by fleet managers, owner-operators and especially service technicians, who won't need extra troubleshooting hardware, testing kits and complex troubleshooting trees to diagnose problems, because it's all automatic."
Innovative technology used by the APX control system makes Virtual Tech's diagnostic capabilities possible, Fragnito said. Unlike earlier controls, APX uses no mechanical relays. This means the Virtual Tech application can monitor more system operations, with the ability to identify more than 250 different alarm conditions, he said.
If the Virtual Tech application senses a problem, it activates the refrigeration unit's amber external warning light to alert the driver, and the alarm LED flashes on the control system display module. When the alarm button is pushed, a text message describing the problem appears on the APX display module. If a specific control module needs repair or replacement, that module's red fault light glows for easy identification.
For units equipped with telematics capability, Virtual Techis capable of relaying system status and faults to a centralized dispatcher by way of Carrier's DataTrak option.
When APX is operating in technician mode, Virtual Tech provides analytic and diagnostic information on the display module's dashboard. The APX control system dashboard generates more information in fewer keystrokes than existing control systems and can simultaneously show data from up to five sensors, providing a large overview of system performance.
Virtual Tech also records operational data so that detailed performance reports can be downloaded for review on a computer with Carrier Transicold's new TRU-Tech and TRU-View PC programs. The APX control system is standard with Carrier's new 2500 APX and 2100 APX models in the X2 series of trailer refrigeration units.
The new application continuously monitors the operation of all unit components - refrigeration, mechanical and electrical - as well as the APX control system itself.
"The Virtual Tech application is like having a ride-along service technician watching the unit's performance," said Mark Fragnito, Carrier Transicold's product manager, electronics . "It helps take the guesswork out of refrigeration unit service, making troubleshooting easier and faster, and improving equipment uptime in the process.
"It's a tool that will be well received by fleet managers, owner-operators and especially service technicians, who won't need extra troubleshooting hardware, testing kits and complex troubleshooting trees to diagnose problems, because it's all automatic."
Innovative technology used by the APX control system makes Virtual Tech's diagnostic capabilities possible, Fragnito said. Unlike earlier controls, APX uses no mechanical relays. This means the Virtual Tech application can monitor more system operations, with the ability to identify more than 250 different alarm conditions, he said.
If the Virtual Tech application senses a problem, it activates the refrigeration unit's amber external warning light to alert the driver, and the alarm LED flashes on the control system display module. When the alarm button is pushed, a text message describing the problem appears on the APX display module. If a specific control module needs repair or replacement, that module's red fault light glows for easy identification.
For units equipped with telematics capability, Virtual Techis capable of relaying system status and faults to a centralized dispatcher by way of Carrier's DataTrak option.
When APX is operating in technician mode, Virtual Tech provides analytic and diagnostic information on the display module's dashboard. The APX control system dashboard generates more information in fewer keystrokes than existing control systems and can simultaneously show data from up to five sensors, providing a large overview of system performance.
Virtual Tech also records operational data so that detailed performance reports can be downloaded for review on a computer with Carrier Transicold's new TRU-Tech and TRU-View PC programs. The APX control system is standard with Carrier's new 2500 APX and 2100 APX models in the X2 series of trailer refrigeration units.
Tool Academy with Marissa Hiroko - Tech
It’s easy to let your garage turn into a chaotic mess, but it doesn’t have to be that way. Here, Marissa shows us a few free and/or low-cost ideas to help control your space, so that you can put the attention where it needs to be: on your car.
2012年8月9日星期四
Student performance improves when teachers given incentives upfront
The study showed that students gained as much as a 10 percentile increase in their scores compared to students with similar backgrounds — if their teacher received a bonus at the beginning of the year, with conditions attached. There was no gain for students when teachers were offered the bonus at the end of the school year, the research found. "
This is the first experimental study to demonstrate that teacher merit pay can have a significant impact on student performance in the U.S.," said UChicago economist John List, an author of the study.
The study, "Enhancing the Efficacy of Teacher Incentives through Loss Aversion: A Field Experiment," published by the National Bureau of Economics Research, reflects the findings of other studies in psychology and behavioral economics. "
The results of our experiment are consistent with over 30 years of psychological and economic research on the power of loss aversion to motivate behavior: Students whose teachers in the 'loss' treatment of the experiment showed large and significant gains in their math test scores," said List, the Homer J. Livingston Professor in Economics at UChicago.
"In line with previous studies in the United States, we did not find an impact of teacher incentives that are framed as gains (the reward coming at the end of the year)," he added.
The other authors of the study were Roland Fryer Jr., the Robert M. Beren Professor of Economics at Harvard University; Steven Levitt, the Homer J. Livingston Professor in Economics at the University of Chicago; and Sally Sadoff, assistant professor at the Rady School of Management at the University of California, San Diego.
The study comes amid a growing wave of interest of finding ways to provide teacher incentives to increase student performance. Those incentives are frequently tied to student performance on high-stakes standardized tests. None of the programs have been shown to work, however, the scholars said.
The new study depends on a formula developed by Derek Neal, professor of economics at UChicago, and Gadi Barlevy, an economist with the Federal Reserve Bank of Chicago. They devised the "pay for percentile" method of measuring teacher performance by comparing individual students with similar backgrounds and achievement to see what impact a teacher had on their learning.
The scholars used the formula in an experiment in Chicago Heights, Ill., a community 30 miles south of Chicago. The community has nine kindergarten to eighth-grade schools with a total enrollment of 3,200 students. Its achievement rates are below state average, and 98 percent of the students are eligible for free or reduced lunches.
At the beginning of the school year, the teachers were introduced to the experiment and offered an opportunity to participate. A total of 150 of the 160 teachers agreed to join in the study, which was supported by the local teachers union.
The teachers were randomly assigned to a control group as well as a group given a bonus at the beginning of the year, a group that could receive the bonus at the end of the year, and a group made up of teachers who worked in teams. Money for the bonuses was provided from private sources.
One group of teachers in the study was given a $4,000 bonus at the beginning of the year and told it would be reduced by an amount reflecting their students' performance — the more the students' standardized scores increased, the more of the bonus their teacher could keep. Another group of teachers was told they would receive a $4,000 bonus if their students improved during the year.
The incentives were based on rewarding teachers with $80 for each percentile of increase in their students' mathematics performance over the district average. They could, depending on exceptional student performance, receive up to $8,000 under the plan — the equivalent of 16 percent of the average teacher salary in the district.
The students were tested with the ThinkLink Predictive Assessment, a standardized, non-high-stakes diagnostic tool that is aligned with state achievement tests . Thomas Amadio, superintendent of Chicago Heights Elementary School District 170, where the experiment was conducted, said the study shows the value of merit pay as an encouragement for better teacher performance.
"Teachers do have challenges, and classes can vary from year to year in how well they perform. Testing students individually to see their growth is a valuable measure, however," he said. Teachers responsible for that growth should be rewarded, he said.
This is the first experimental study to demonstrate that teacher merit pay can have a significant impact on student performance in the U.S.," said UChicago economist John List, an author of the study.
The study, "Enhancing the Efficacy of Teacher Incentives through Loss Aversion: A Field Experiment," published by the National Bureau of Economics Research, reflects the findings of other studies in psychology and behavioral economics. "
The results of our experiment are consistent with over 30 years of psychological and economic research on the power of loss aversion to motivate behavior: Students whose teachers in the 'loss' treatment of the experiment showed large and significant gains in their math test scores," said List, the Homer J. Livingston Professor in Economics at UChicago.
"In line with previous studies in the United States, we did not find an impact of teacher incentives that are framed as gains (the reward coming at the end of the year)," he added.
The other authors of the study were Roland Fryer Jr., the Robert M. Beren Professor of Economics at Harvard University; Steven Levitt, the Homer J. Livingston Professor in Economics at the University of Chicago; and Sally Sadoff, assistant professor at the Rady School of Management at the University of California, San Diego.
The study comes amid a growing wave of interest of finding ways to provide teacher incentives to increase student performance. Those incentives are frequently tied to student performance on high-stakes standardized tests. None of the programs have been shown to work, however, the scholars said.
The new study depends on a formula developed by Derek Neal, professor of economics at UChicago, and Gadi Barlevy, an economist with the Federal Reserve Bank of Chicago. They devised the "pay for percentile" method of measuring teacher performance by comparing individual students with similar backgrounds and achievement to see what impact a teacher had on their learning.
The scholars used the formula in an experiment in Chicago Heights, Ill., a community 30 miles south of Chicago. The community has nine kindergarten to eighth-grade schools with a total enrollment of 3,200 students. Its achievement rates are below state average, and 98 percent of the students are eligible for free or reduced lunches.
At the beginning of the school year, the teachers were introduced to the experiment and offered an opportunity to participate. A total of 150 of the 160 teachers agreed to join in the study, which was supported by the local teachers union.
The teachers were randomly assigned to a control group as well as a group given a bonus at the beginning of the year, a group that could receive the bonus at the end of the year, and a group made up of teachers who worked in teams. Money for the bonuses was provided from private sources.
One group of teachers in the study was given a $4,000 bonus at the beginning of the year and told it would be reduced by an amount reflecting their students' performance — the more the students' standardized scores increased, the more of the bonus their teacher could keep. Another group of teachers was told they would receive a $4,000 bonus if their students improved during the year.
The incentives were based on rewarding teachers with $80 for each percentile of increase in their students' mathematics performance over the district average. They could, depending on exceptional student performance, receive up to $8,000 under the plan — the equivalent of 16 percent of the average teacher salary in the district.
The students were tested with the ThinkLink Predictive Assessment, a standardized, non-high-stakes diagnostic tool that is aligned with state achievement tests . Thomas Amadio, superintendent of Chicago Heights Elementary School District 170, where the experiment was conducted, said the study shows the value of merit pay as an encouragement for better teacher performance.
"Teachers do have challenges, and classes can vary from year to year in how well they perform. Testing students individually to see their growth is a valuable measure, however," he said. Teachers responsible for that growth should be rewarded, he said.
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