About ______ of the variation in age of puberty is determined by genes
one-half
two-thirds
one-fourth
three-fourths
two-thirds
You might also like to view...
A token economy is an incentive system in which hospitalized patients with schizophrenia
a. earn "tokens" for appropriate behavior. b. lose "tokens" for disruptive behavior. c. both of these d. neither of these
Groups of subjects are not compared in a correlational study as they are in ______ experiments.
a. quasi b. analytical c. descriptive d. predictive
It is easy to condition a pigeon to peck a key to obtain food, but hard to condition
one to peck a key to avoid shock. This illustrates that (a) the laws of conditioning generalize (b) punishment does not suppress behavior (c) extinction interferes with reinforcement (d) behavior is not infinitely flexible
Sunny and her family have lived in the U.S. for eleven years. Her friend, Sonia, has just moved to the U.S. two years ago. Both Sunny and Sonia's family came from the same village in Mexico. According to research, based on their years in the United States
a. Sunny b. Sonia c. Both girls d. Neither girl