Volunteers for a research study could introduce bias because
a. they are less likely to show change than subjects who are required to participate.
b. they may be different from nonvolunteers on important variables.
c. they are more subject to the Hawthorne effect than nonvolunteers.
d. Al of these are true.
B
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Your roommate is terribly messy and has a habit of leaving his/her clothes all over the bathroom floor despite your pleas to put them in the hamper. How might you use shaping to alter your roommate's behavior? Include the successive behaviors, the specific end goal/behavior, and the proposed reinforcers in your description
What will be an ideal response?
A ______ variable such as “type of car driven” is measured at the ______ level of measurement.
a. categorical; nominal b. continuous; nominal c. categorical; interval d. continuous; ratio
A diagnosis of SP is given only when:
a. Other anxiety disorders have been ruled out b. A rule out for fear related to separation (separation anxiety disorder) occurs c. A rule out for social situations (social phobia) occurs d. A rule out for dirt/contamination (obsessive-compulsive disorder) occurs e. All of the above
When computing a correlation coefficient, if you have 27 degrees of freedom, your sample size must be _______.
a. 29 b. 27 c. 25 d. 26