A recent study examined the short-term memory of college students under the influence of alcohol. Students were given a beverage with either no alcohol, 1 ounce of alcohol, or 2 ounces of alcohol. After drinking it, the experimenter asked students to complete a forward digit span to see how many digits they could remember in the order presented). What is the independent variable in this study?
A researcher wants to ensure that the personality test she is administering to participants in her longitudinal study remains valid over the decade the research will be taking place. What type of reliability does this reflect?
Dr. Jones is conducting a study with 50 participants. She creates a spreadsheet in which she sorts participants in order of birth, so the oldest participant is first in the list and the youngest participant is last. Next, she codes an AGE variable for each person according to the order they were born (so the oldest is 1 and the youngest is 50). What type of measurement scale has Dr. Jones used to code her variable of AGE?
An investigator is interested in studying the sexual orientation of college students. As an alternative to directly inquiring about their sexual orientation, he has asked participants to rate from 0 to 100 their attraction to males and then to rate from 0 to 100 their attraction to females. Conceivably, a heterosexual male could have no attraction to males, whereas a bisexual male might report being 100% attracted to females and 50% attracted to males, thereby indicating he was twice as attracted females as males. What type of measurement scale has this investigator used?
Rhonda has conducted a study in which she has tested the effectiveness of the drug DHEA on improving episodic memory in older adults. She has tested her subjects on two different occasions. In one session her subject received a placebo, and in the second they received 50 mg of DHEA. At each test session the subjects completed a recognition memory task to measure episodic memory performance. What is Rhonda’s dependent variable?
__________________ is a statistic used to represent the size or magnitude of the result of an experimental manipulation.
Dr. Stevens is conducting a research study in which participants will be asked to express their views on same-sex marriage by writing their personal opinion on the matter. What type of behavioral measure has Dr. Stevens used?
________________ research features a type of design in which the primary goal is to predict thoughts, feelings, or behaviors.
__________________is the process of specifying the relationship between a conceptual variable and a quantitative measure.
A researcher is testing out a new personality assessment to determine a study participant’s personality type. He shows that scores from his new measure are unrelated to measures of mood and cognitive ability. He has demonstrated that his new assessment has _________validity.