When an object such as shoes or women's underwear is used during masturbation as the sole means of achieving sexual gratification and this practice is distressing to the individual, the diagnosis is ____

The three types of memory tasks used to measure forgetting are recall, _________, and _________

Fill in the blank(s) with correct word

Researchers who conduct ________ must be very concerned with ruling out alternative explanations for their findings, due to the natural separation between groups

a. experimental studies c. quasi-experiments b. causal studies d. qualitative studies