Experienced discussion groups have a high tolerance for __________

Virtual world games, like Second Life, are sometimes used by interviewers so that they can assess _____

A. the applicant's educational background B. how an applicant acts under pressure C. the appropriateness with which an applicant dresses him/herself and acts D. an applicant's work history

A researcher examining the effects of sex and types of humor presented on commercials on purchase likelihood shows programming with commercials with three different types of humor. Participants view the programming and commercials in groups of 15. The researcher observes that participants’ laughter is contagious. That is, if one person laughs, others seem to join the laughter. What potential

threat to internal validity has the researcher just observed? a. Experimenter effect b. The Hawthorne effect c. Testing effect d. Intersubject bias