. A researcher conducts a study with NO random assignment (groups are already determined),a manipulation, and descent control of all other variables. What kind of design has the researcher used? a. Experimental b. Quasi-experimental c. Observational d. Case-study IVs: Snow (yeslno), hot chocolate (yesino), cookies (yeslno) DVs: happiness (continuous , 1-7 Likert scale) What is the design? a. 3x2 b. 2x3 c. 2x2x2 d. 2x2x2x7 . You would use a mixed model factorial design when you have: a. more than 3 IVs b. more than 3 levels of an IV c. at least one continuous IV and at least one categorical IV d. at least one within subjects IV and at least one between subjects IV . A student is conducting a study on colorgrapheme synesthesia, a phenomenon in which people mentally associate numbers or letters with specic colors. The student's friend is a color-grapheme synesthete who participates in his study. The student subsequently tests other color-grapheme synesthetes referred to him by his friend. Which sampling approach did the student use? a. Self-selection b. snowball sampling c. simple random sampling d. cluster sampling . A hapless statistician drowned while wading across a river with a mean depth of 3 ft. What did the statistician forget to take into account? a. The median b. Variability c. Confounds d. external validity . A professor conducted a correlational study to investigate the relationship between spelling ability and math ability in children. Unfortunately, it was impossible to nd any meaningful correlation because all of the children in the study scored above 95% on the spelling test and below 5% on the math test. Which two effects did the professor observe, respectively? a. ceiling; oor. b. floor, ceiling c. practice; fatigue d. fatigue practice