About how many different types of psychological therapy are currently

A rat presses a bar when a light is on but not when it is off because in the past a

bar press has been reinforced when the light was on but not when it was off. The light is a/an (a) reinforcer (b) positive reinforcer (c) negative reinforcer (d) partial reinforcer (e) discriminative stimulus

The moral component of personality, according to Freud, is represented by the

A) ?id. B) ?ego. C) ?superego. D) ?superid.