While conducting statistical analysis, Gordon forgets how to calculate degrees of freedom. All he knows is that Group 1 has twenty-three subjects and Group 2 has twenty-seven subjects. How many degrees of freedom should Gordon use for his analysis?

Which of the following is NOT a behavioral technique based on classical conditioning?

a) flooding b) exposure and response prevention c) token economy d) systematic desensitization

_____ occurs when an individual is asked to imagine or even be in the presence of the feared object; he/she remains there until the fear has subsided

a) Aversion therapy b) Systematic desensitization c) Exposure and response prevention d) Flooding