An educational psychologist wanted to know if second grade students were more accurate at solving math problems when the teacher presented the problem in a nonverbal picture form compared to a verbal story form. Students were randomly assigned to conditions and the results revealed more correct answers in the nonverbal condition. What type of manipulation did the researcher use?

straightforward

Explanation:

Based on the scenario being described within the question it can be said that in this situation the psychologist has used straightforward manipulation. This is a type of manipulation in which the researcher presents written, verbal, or visual material to the participants. Which is what the psychologist is doing by by introducing either nonverbal picture form or a verbal story form to the participants/students.

yes

it is because 3 because the citizen the northern democratic party watned the warning on red to blue because it is purple. lol