Biologist Leonard Hayflick first discovered that cells can replicate themselves about how times before they lose their ability to replicate?

What therapeutic approach focuses on threatening thoughts and desires that lead to unconscious conflicts that create mental disorders?

a. psychoanalysis c. cognitive therapy b. client-centered therapy d. behavior therapy

The best way to increase response strength in self-modification is through

A) ?positive reinforcement. B) ?finding a reward effective for that person. C) ?choosing a readily available reinforcer. D) ?all of these.