Advanced Research Methods - EXAM 2025

Advanced Research Methods - EXAM 2025 A nutritionist conducted an experiment on memory for dreams. She wanted to test whether it really was true that eating cheese before going to bed made you have bad dreams. Over three nights, the nutritionist fed people different foods before bed. On one night they had nothing to eat, a second night they had a big plate of cheese, and the third night they had another dairy product, milk, before bed. All people were given all foods at some point over the three nights. The nutritionist measured heart rate during dreams as an index of distress. How should these data be analysed? - ANSWER-One-way repeated measures ANOVA .A regression analysis is inappropriate when - ANSWER-there is heteroscedasticity in the scatter plot. .A researcher measured people's physiological reactions while watching a horror film and compared them to when watching a comedy film, and a documentary about wildlife. Different people viewed each type of film. The resulting data were normally distributed and the variances across groups were similar. What test should be used to analyse the data? - ANSWER-Between subjects ANOVA .A researcher measured people's physiological reactions while watching a horror film and compared them to when watching a comedy film, and a documentary about wildlife. Different people viewed each type of film. The resulting data were normally distributed and the variances across groups were similar. What test should be used to analyse the data? - ANSWER-Repeated measures ANOVA .A simple structure is - ANSWER-where variables load onto one and only one component. .A split-plot ANOVA is like a factorial ANOVA with respect to: - ANSWER-number of factors & number of dependent variables .A t test in the Coefficients table of an SPSS multiple regression analysis has a Sig. value of .007. This indicates that - ANSWER-the regression coefficient for the predictor variable is significant & the Beta weight for the predictor variable is significant .A test with a high degree of systematic error, and little random error, will: - ANSWER-have high reliability, and low validity .A two-factor ANOVA consists of - ANSWER-three separate hypothesis tests .A within-subjects factorial design - ANSWER-assures equivalence of groups at the start of the study. .As the discrepancy between the observed and expected frequencies becomes larger, the magnitude of the chi-square statistic _______. - ANSWER-increases .Between groups ANOVA is to _______ as repeated-measures ANOVA is to ______ - ANSWER-between-group t-test; within-subject t-test .Brivariate correlation - ANSWER-the relationship between two variables .Depth Interviews: - ANSWER-research is more qualitative in nature .Dr Johnson has developed a new psychological test and, after conducting some special tests on the test itself, she has determined that all of the items on the test appear to be measuring the same psychological concept. Thus, we would say that her new test has strong or high: - ANSWER-internal consistency .Experimental design involves: - ANSWER-manipulation and control of factors to allow causal conclusions .Factorial designs allow us to study both ______ effects of the independent variables on the dependent(s). - ANSWER-main and interactive .How can you deal with low expected values in a one way chi-square? - ANSWER-You can increase your sample size or combine categories .If factors have been produced using Varimax, what sort of rotation method has been used? - ANSWER-orthogonal .If factors have been produced using Varimax, what sort of rotation method has been used? - ANSWER-orthogonal .If the individual items on a test are all highly correlated with one another, then the test has high: - ANSWER-internal consistency. .In a PCA, the first component has an eigenvalue of 2.5 and the percentage of variance is 12.5. How many variables are there in this analysis? - ANSWER-20 .In a repeated measures factorial design, - ANSWER-order effects must be controlled.