Josh is a participant in a study in which prompts from his smartphone require him to report on his mood, social interactions, and other variables throughout the day. Evidently, the study he is participating in is making use of the procedure called:'

Ecological momentary assessment

Explanation:

Ecological momentary assessment aims at repeating samples of thesis experiment to understand it's current behavior and experience in natural situation. It focuses on minimizing bias and improving ecological validity. The study Josh is participating which considers mood and social interaction is using an ecological momentary assessment procedure.

answer; john b watson,(observable behavior);

answer; nearly half;