T-Tests
Directed Reading Activities
Reading performance of two groups of pupils - one control group and one group that was given Directed Reading Activities.
Data from Moore, McCabe, & Craig.
Eye Movements
The number of correctly recalled words by two groups of participants - during the retention interval, one group was instructed to fixate on a centrally presented dot
The example JASP file demonstrates the use of a Bayesian independent samples t-test.
Subset of the data reported in Matzke et al. (2015).
Invisibility Cloak
The number of mischievous acts committed by two groups of people, those with and those without an invisibility cloak.
Fictional data from Andy Field.
Kitchen Rolls
Openness to Experience scores for two groups of students - while filling out the personality questionnaire, both groups rotated a kitchen roll with their hands (one group clockwise, the other group counterclockwise).
The example JASP file demonstrates the use of a Bayesian and frequentist versions of independent samples t-test.
Data reported in Wagenmakers et al. (2015).
Moon and Aggression
The number of disruptive behaviors by dementia patients during two different phases of the lunar cycle.
Data from Moore, McCabe, & Craig.
Stereograms
The time it took two groups of participants to see the objects hidden in a stereogram - one group received advance information about the scene, the other group did not.
The example JASP file demonstrates the use of a Bayesian independent samples t-test.
Data reported in Frisby & Clatworthy (1975).
Weight Gain
Weight of 16 participants before and after an eight-week period of excessive calorie intake.
Data from Moore, McCabe, & Craig.