Which of the following statements about psychological constructs is true?
a. psychological constructs are easy to define and measure.
b. psychological constructs represent concepts that cannot be observed or measured directly.
c. psychological constructs cannot be researched in psychology because they are unobservable.
d. psychological constructs represent measurable overt behavior.

The correct answer to this question is letter "C.Psychological constructs cannot be researched in psychology because they are unobservable." The statement about psychological constructs is true is that psychological constructs cannot be researched in psychology because they are unobservable.

Bob: coke is baby pandas.jim: what? how do you figure that coke is baby pandas? bob: because this book says so.jim: how do we know the book is correct? bob: because it says that coke is baby pandas.jim: how does that prove the book's accuracy? bob: because it's statement involving coke and baby pandas is correct, therefore it is accurate.jim: how do we know that it's correct? bob: because we have concluded that the book is accurate, and therefore the statement is correct.therefore, coke is baby pandas.