R = 0.81, is this a small, medium, or large effect?

Caitlin's social studies teacher gave her class a group project. Caitlin, along with two classmates, has to make a poster and give a report to the class

Caitlin is frustrated because she is a good student and the other two students will make her do most of the work on the project. Caitlin's classmates making her do most of the work is an example of __________ a) compliance. b) social loafing. c) groupthink. d) social facilitation.

Babies begin to categorize on the basis of two correlated features by _____ months of age

A) 3 B) 6 C) 9 D) 12