During middle childhood in most cultures, gender roles become more ____

What type of intervention involves subjecting the cancerous part of the body to toxic substances intended to poison the cancer cells?

a. chemotherapy b. radiation therapy c. angiogenesis inhibitors therapy d. gene therapy

Stimulus control is an operant conditioning procedure in which

a. a response is followed by discomfort or an undesirable effect. b. close approximations to a desired response are rewarded. c. a person is removed from a situation to prevent reward. d. responses come under the influence of the situation in which they occur.