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. Please select the best answer from the choices provided A B C D

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt