Behaviorists branded the study of imagery as being unproductive because .

a. the imageless thought debate was unresolved
b. visual images vary in detail
c. some people have great difficulty forming visual images
d. visual images are invisible to everyone except the person experiencing them.

The correct answer is option D "visual images are invisible to everyone except the person experiencing them"

Explanation:

Imagery makes use of particular words that create visual representation of ideas in our minds. The word “imagery” is associated with mental pictures. However, for imagery to be realistic, turns out to be more complex than just a picture.

Imagery study is branded to be unproductive according to the Behaviorists base on the fact that the images produced at the cause of imagery are not visible to everyone but rather, they are only visible to the person who is experincing the imagery which is the correct answer.

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chronological thinking is an indispensable tool to structure a historical narrative and to give meaning to a sequence of events. the final section presents the results of a survey to test the chronological thinking of lower secondary school students carried out by the educational research institute.