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Old 05-06-2012, 05:53 PM   #11 (permalink)
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What we are talking about is not 'truely placebo effect' (as frank stated)
here is an example:
I give frank lee, Darin and Carlos each a geo metro to drive. I tell Frank Lee and carlos their cars are exactly modded to achieve optimal mileage.
(for the sake of the test I have only increased the air pressure in Carlos tires to 48psi, frank lee & darin are at 32)
Frank is the placebo.

Darin knows that he has no alterations and just drives.
Frank Lee thinks he has a 'modded' car and subconsiously drives better.
Carlos gets better mileage because of the mode (and subconsoiusly drives better)

In the medical/pharma field, the placebo effect can be as high as 15% of the blind group can 'feel' a positive result of the sugar tablet.

What we experience is really a 'shadow' effect. or ghost effect. or guilt effect.

But I agree that it exists.

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MetroMPG: "Get the MPG gauge - it turns driving into a fuel & money saving game."

ECO MODS PERFORMED:
First: ScangaugeII
http://ecomodder.com/forum/showthrea...eii-23306.html

Second: Grille Block
http://ecomodder.com/forum/showthrea...e-10912-2.html

Third: Full underbelly pan
http://ecomodder.com/forum/showthrea...q45-11402.html

Fourth: rear skirts and 30.4mpg on trip!
http://ecomodder.com/forum/showthrea...tml#post247938

Last edited by mcrews; 05-06-2012 at 06:14 PM..
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Old 05-06-2012, 06:11 PM   #12 (permalink)
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Aw Man, I wanted the modded car!
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Old 05-06-2012, 06:13 PM   #13 (permalink)
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Quote:
Originally Posted by Frank Lee View Post
Aw Man, I wanted the modded car!


believe me....I gave A LOT of thought as to who got which car
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MetroMPG: "Get the MPG gauge - it turns driving into a fuel & money saving game."

ECO MODS PERFORMED:
First: ScangaugeII
http://ecomodder.com/forum/showthrea...eii-23306.html

Second: Grille Block
http://ecomodder.com/forum/showthrea...e-10912-2.html

Third: Full underbelly pan
http://ecomodder.com/forum/showthrea...q45-11402.html

Fourth: rear skirts and 30.4mpg on trip!
http://ecomodder.com/forum/showthrea...tml#post247938
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Old 05-06-2012, 09:43 PM   #14 (permalink)
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Wikipedia is our friend: List of cognitive biases - Wikipedia, the free encyclopedia.

See Experimenter's Bias and Selective Perception.
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The vacuum gauge plus wheel covers helped increase summer 2015 mileage to 38.5 MPG, while summer 2016 mileage was 38.6 MPG without the wheel covers. Drove 33,021 miles 2016-2018 at 35.00 MPG.
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Old 05-06-2012, 10:03 PM   #15 (permalink)
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Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
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I learned back in college about placebo, test bias, and test procedure. I did a bunch of aeromods and coast-down testing and wanted so badly for the data to confirm the efficacy of the mods, but it didn't. And that's what I presented in my paper even though cherry picking "favorable" results did cross my mind.
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Old 05-07-2012, 09:56 AM   #16 (permalink)
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Ah, but didn't you use a shaky measurement technique that relied on you watching an analog gauge & manually pressing a stopwatch start/stop? There's a lot of wetware in the methodology adding to the experimental noise.

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Related to this topic: http://ecomodder.com/forum/showthrea...ery-11445.html
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Old 05-07-2012, 02:37 PM   #17 (permalink)
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ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

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There sure was!
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Old 05-07-2012, 10:12 PM   #18 (permalink)
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If you want to experience a true demonstration of this effect, buy an ecomodder sticker and put in on the left side of your car so you see it every time you get in your car.

To this day, I swear it has some magical MPG boosting effect.
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Old 05-08-2012, 02:29 AM   #19 (permalink)
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Quote:
Originally Posted by HilseeJ View Post
If you want to experience a true demonstration of this effect, buy an ecomodder sticker and put in on the left side of your car so you see it every time you get in your car.

To this day, I swear it has some magical MPG boosting effect.
Probably one of the greatest contributions of this site is the effect that we are referring to.

You can find several sites that promote mpg. But you feel like you have to get a 'pocket protector' to post there on a regular basis. Or give up your believe in physics and chemestry.

Here there is the idea that anyone can play in the sandbox That has a very 'it's ok' sffect on each persons efforts to get better mpg!
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MetroMPG: "Get the MPG gauge - it turns driving into a fuel & money saving game."

ECO MODS PERFORMED:
First: ScangaugeII
http://ecomodder.com/forum/showthrea...eii-23306.html

Second: Grille Block
http://ecomodder.com/forum/showthrea...e-10912-2.html

Third: Full underbelly pan
http://ecomodder.com/forum/showthrea...q45-11402.html

Fourth: rear skirts and 30.4mpg on trip!
http://ecomodder.com/forum/showthrea...tml#post247938
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Old 05-08-2012, 08:44 AM   #20 (permalink)
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In my case, I have to take the long look at what I am doing. I have no scangauge, no instant gratification, and I drive the truck sporadically. It takes me months to really accumulate enough data so I gave up on ABA testing. I just do things that are proven to help, sit back and enjoy the 'ride'. I'll make three changes to the truck in the course of the next tankful.

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