which of the following is true of positive and negative reinforcers? a positive reinforcers increase the rate of operant responding; negative reinforcers decrease the rate of operant responding. b positive reinforcers decrease the rate of operant responding; negative reinforcers increase the rate of operant responding. c positive reinforcers have no effect on the rate of operant responding; negative reinforcers decrease the rate of operant responding. d positive reinforcers increase the rate of operant responding; negative reinforcers have no effect on the rate of operant responding e positive reinforcers increase the rate of operant responding; negative reinforcers increase the rate of operant responding.
