Leaf and Berry (2015) recruited 60 undergraduates from a beg…

Leaf and Berry (2015) recruited 60 undergraduates from a beginning psychology course and randomly assigned half of them to learn course material from video games and the other half to learn course material from teaching course material to a peer. Students took a multiple-choice test to measure understanding of the course material. What type of design did Leaf and Berry use?

In a study by Rosengren, Schein, and Gutiérrez (2010), scale…

In a study by Rosengren, Schein, and Gutiérrez (2010), scale errors committed by children between the ages of 18 and 29 months were recorded while they were at play in a laboratory preschool. The researchers placed miniature replica toys in the preschool classroom during specific time periods to increase the likelihood of observing scale errors. This study is an example of a: