On the Mechanical Turk website, researchers post studies and anyone who wants to can participate for a small fee. What kind of research sample does this provide?

a. It is a convenience sample.
b. It is a random sample

Object permanence is not just a test of knowledge of the properties of objects, but also of ____

a. short-term memory b. long-term memory c. episodic memory d. semantic memory

According to the article PPll lease Pass the Vegetabll lesabout egocentricity in small children, social referencing may:

(a) help the child to make friends (b) make the parent feel needed (c) be a way of learning about authority (d) have survival value