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Related Concept Videos

Multiple Comparison Tests01:13

Multiple Comparison Tests

Multiple comparison test, abbreviated as MCT, is a post hoc analysis generally performed after comparing multiple samples with one or more tests. An MCT will help identify a significantly different sample among multiple samples or a factor among multiple factors.
It would be easy to compare two samples using a significance alpha level of 0.05. In other words, there is only one sample pair to be compared. However, it would be difficult to identify a significantly different sample if the number...

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Testing Replicability and Generalizability of the Time on Task Effect.

Raimund J Krämer1, Marco Koch2, Julie Levacher2

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The time on task (ToT) effect shows faster answers are usually more accurate, but accuracy increases with time for difficult items or lower ability individuals. This cognitive processing pattern is reliable but moderately generalizable across different tests.

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Area of Science:

  • Cognitive Psychology
  • Educational Measurement
  • Psychometrics

Background:

  • The time on task (ToT) effect links time spent on a task to successful completion probability.
  • The ToT effect's magnitude and direction vary based on test-taker and item characteristics.
  • Prior research indicates time investment benefits accuracy for difficult items/low ability, but hinders it for easy items/high ability.

Purpose of the Study:

  • To test the replicability of the ToT effect pattern across independent samples from the same populations.
  • To assess the generalizability of the ToT effect across different ability tests.
  • To investigate how item difficulty and individual ability moderate the ToT effect.

Main Methods:

  • Estimated ToT effects for three reasoning tests and one natural sciences knowledge test.
  • Utilized 10 comparable subsamples from a total N = 2640 participants.
  • Analyzed differential correlations of ToT effects across ability tests.

Main Results:

  • Subsample results were highly similar, indicating reliable estimation of ToT effects.
  • Faster responses generally correlated with higher accuracy, suggesting effortless processing.
  • The ToT effect reversed with increasing item difficulty and decreasing person ability, favoring longer processing times for accuracy.

Conclusions:

  • The within-task ToT effect moderation aligns with effortful processing or cognitive load theories.
  • Generalizability of the ToT effect across different tests was only moderate.
  • Cross-test ToT effect relationships depend on test characteristics like reliability and processing similarity.