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COMBINING SPEED AND ACCURACY IN COGNITIVE PSYCHOLOGY - Coggle Diagram
COMBINING SPEED AND ACCURACY IN COGNITIVE PSYCHOLOGY
Is the inverse efficiency score (IES) a better dependent variable than the mean reaction time (RT) and the percentage of errors (PE)
1) SPEED AND ACCURACY AS DEPENDENT VARIABLES
Most of the time, analyzed separately
Go in the same direction
FOCUS on reaction time
Exceptions
High percentage of errors
Percentage of errors analysis returns a significant effect while Reaction Time analysis doesn't
Speed-accurancy trade-off
NOT consider the data
2) THE INVERSE EFFICIENCY SCORE
3) AN EXAMPLE WHERE IES WORKS WELL
Rossignol, Bruyer, Philippott and Campanella study of emotional expressions displayed by morphed faces
Combination of Speed and Accuracy
The average energy consumed by the system over time
Considers all properties
4) IES IS NOT ALWAYS BETTER THAN RT
5) SITUATIONS IN WHICH IES MAY BE PROBLEMATIC
6) CONCLUSIONS
Not blind use, many risks
Increasing variability of the data
For example, in the case of small number of observations
Diminish the power of experiment
Necessity of high correlation between reaction time and accurancy
But always better calculate them separately
When there are high error rates
Low number of correct responses, correct latencies are unstable
Possibility that correct responses are guessed
Multiplication of reaction time due to percentage of error is not linear
Advide to use when there is positive correlation between reaction time and percentage of error (but nothing is guaranted)
Goffaux et al. study
And effect observed disappeared from RT Analysis to IES Analysis
Problems in combining two different variables subject to sampling error
Increasing in variability
Not clear division of reaction time and percentage of errors
Word frequency effect
IES explain less percentage of variance than reaction time analysis