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Psychology

PSYC 3000

Bruce Hutcheon

Winter

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In a 1way withinsubjects ANOVA the sumofsquares term quantifying the stable differences between participants is calculated using all the observations in the entire design T In a 2way withinsubjects design if both variables have 5 degrees of freedom then the degrees of freedom for their interaction is 10F levels a x levels b 5x525 When considering the main effect of treatment A in a 2way ANOVA the larger the standard deviation of the marginal means for treatment A the larger the effect size fT The dependent variable in a withinsubjects ANOVA is Aassumed to be nominal dataFinterval For a test that the correlation coefficient in the population os zero you can increase the power of the tests by increasing n T For a 2way withinsubjects ANOVA the main effects of the treatments and the interaction are all tested using different MS termsTeach treatment has own error For a 2way mixedfactors ANOVA the Errormain effects of the treatments and the interaction are all tested using different MS terms F For a 2way mixedfactors ANOVA if you know only the values of a b and n then it is still Errorpossible to calculate the betweensubjects df F For a 2way withinsubjects ANOVA if you know the values of a b and n then it is still possible to calculate the betweensubjects df ErrorError2T In a 2way withinsubjects design the number of possible simple effects that can be tested is a times bFab The maximum value ofis 1T 01 For treatment A in a 222partial2way design the value ofis always greater than or equal to the value ofT denominator decreasing For a 1way design the value ofdoes AAnot depend on whether you perform a withinsubjects or betweensubjects analysis T The minimum value for Cohens f is 0Tno neg values A large Cohens effect size f for an ANOVA means that the null hypothesis will be rejected F If the regression slope for a bivariate dataset is positive then the correlation coefficient will be positive tooT The larger the sample size the smaller the standard error of the regression slope T The larger the slope of the regression line the greater the proportion 222of explained variationFunrelatedand r are similar in that they both represent the proportion of unexplained variation in a dependent variableFexplained2and r are similar in that they both represent the proportion of explained variation in a dependent variableTbivariate dataset with n5 and r05 What is the standard error of the correlation coefficient s estimated from this samples What is the tvalue in a test that the sample correlation rrcoefficient is significantly different from zerot1 How many degrees of freedom does the tvalue in the previous question have 3bivariate dataset with n5 s40 s2 and bX30What is the standard error of the regression slope s estimated from this sample s10 What is the tvalue in a test that the sample regression slope in the population is b20 t1 bbWhat is the tvalue in a test that the sample regression slope in the population is b0 t3 Researchers are interested in the role of blood sugarinterval in cognitive performance in the elderlyThey have 10 elderly participants drink a glass of an orangeflavoured juice sweetened with glucose to raise their blood sugar levels For each question state what test you would use to determine the association between blood sugar levels and cognitive performanceEach participants is given a difficult cognitive task to perform and the order in which they finish is recordedThe independent variable is the participants actual blood sugar level when undertaking the task Nonparametric correlation Each participant is given a difficult cognitive task to perform and the time needed to finish is recordedThe gender of the participants is recorded as is whether or not they are diabetic Factorial ANOVA2 categorical IV interval DV Each participant is given a difficult cognitive task to perform and the time needed to finish is recordedThe independent variable is the participants actual blood sugar level when undertaking the task Correlation2 interval How many different alpha terms exist in the structural model for a 2way design with a3 and b4 3How many different beta terms exist in the structural model for a 2way design with a3 and b44 How many different alphabeta terms exist in a 2way design with with a3 and b412 Which of the following terms are used in calculating the main effect of treatment A for a 2waySquared deviations of marginal means of A from the grand mean Which of the following characterizes the alphak terms that appear in the structural model for a 2way design Differences between marginal means for treatment A and the grand mean Which of the following characterizes the betaj terms that appear in the structural model for a 2way designDifferences between marginal means for treatment B and the grand mean For a given set of observations in a 1way design the SSError term that appears in an independentsamples analysis of those observations will be smaller than either of the SSError terms that appear in a repeatedmeasures analysisFalse For a given set of observations conducted in a 1way design the value of SSTreatment is the same in an independentsamples analysis and a dependentsamples analysisTrue In a dependentfactors analysis the smaller the value of the SSError derived from individual differences the greater the chance that the treatment will be found to have a significant effect on the dependent variableFalseWhat terms should be squared and summed to form SSSubjects in a 1way repeatedmeasures analysis Deviations of subject means form the grand mean The larger the standard deviation of errors around the regression line the less likely it is that the regression slope b will be significantly different from zero True Suppose you are studying the relationship between mathematical skill and verbal skill If you collect data from students in two different elementary schools and find that the regression slope b for school 1 is twice as large as for school 2 this means that the regression slope for school 1 is more likely to be significantly different from zero F

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