When animal trainers use operant conditioning techniques to slowly condition a new behavior by reinforcing successive approximations of the new desired behavior, the specific name for this is

Why are people more likely to marry individuals with social and cultural backgrounds very similar to their own? a. parents and other family members always exert pressure to marry within the group. b. people spend a great deal of time alone, and therefore can have few opportunities for meeting people. c. people develop irrational fears of out-group members and are scared to date them. d. people have greater access to individuals like themselves.

Children begin to use tools at about what age? a. 18 months b. 2 years c. 1 year d. 6 months

John lennon and paul mccartney belonged to this group