Homework Answers
External validity : external validity refers to the extent to which results from a study can be generalized to the population. By controlling several variables, the results may not be an accurate representation of the population
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In a between-subjects design, holding a potential confounding variable constant helps to reduce the variance within...
An advantage of a within-subjects design as compared to a between-subjects design is... a. All of...
An advantage of a within-subjects design as compared to a between-subjects design is... a. All of these options. b. it eliminates the threat that participant characteristics may become a confounding variable. c. it reduces the variability by subtracting out the individual differences. d. it usually requires fewer participants.
For a between-subjects experiment, the primary threat to internal validity is... a. Holding variables constant. b....
For a between-subjects experiment, the primary threat to internal validity is... a. Holding variables constant. b. Restricting a variables' range. c. It requires extensive efforts to counterbalance conditions. d. The groups may be different from each other on key characteristics.
6. Typically, when comparing a within-subjects design to a between-groups design which of the following describe...
6. Typically, when comparing a within-subjects design to a between-groups design which of the following describe their differences in error variance? a. Within-subjects designs results in less error variance than between-groups. b. A within-subjects design results in more error variance than a between-groups design. C. A within-subjects design results in the same amount of error variance as a between-groups design d. There is no error variance in a within-subjects design, whereas a between- groups design does present some error variance....
Why is random assignment used in between-subjects experimental designs? a. To increase the variance within the...
Why is random assignment used in between-subjects experimental designs? a. To increase the variance within the groups. b. To eliminate systematic differences between the groups. c. To manipulate the independent variable. d. To avoid volunteerism.
answer all please In an analysis of variance, the MS between and MS within represent the...
answer all please
In an analysis of variance, the MS between and MS within represent the means of the squared variability between and within conditions. True • False QUESTION 14 If an analysis of variance produces SS between 30 and MS between 10, then the ANOVA is comparing three treatment conditions. True False QUESTION 15 Compared to an independent measures design a repeated measures study is more likely to find a statistically significant effect because it reduces the contribution of...
A within-subjects design is to the whereas a between-subjects design is to the a. Repeated-measures ANOVA;...
A within-subjects design is to the whereas a between-subjects design is to the a. Repeated-measures ANOVA; One-way ANOVA. b. One-way ANOVA; Chi-square test for independence, c. One-way ANOVA; Repeated-measures ANOVA. d. Dependent samples t-test; Repeated-measures ANOVA
Dr. Strange is attempting to counterbalance his within-subjects research design that has 3 conditions, but he...
Dr. Strange is attempting to counterbalance his within-subjects research design that has 3 conditions, but he isn't sure whether to use complete or partial counterbalancing. If Dr. Strange uses complete counterbalancing he would have groups, whereas if he uses partial counterbalancing he would have groups. In this example, groups = number of orders of treatment conditions. a. 6;3 b. 3; 6 c. 9,5 d. Cannot answer without more information
1) Which of the following must be found in order to observe an effect of the...
1) Which of the following must be found in order to observe an effect of the independent variable in an experiment ? A. high between group variance B. High error variance C. high standards deviations D. high group means 2) what kind of validity is threatened when we cannot generalized the results of the study? A. construct validity B. External validity C. Internal validity D. Statistical validity 3) which cofounding variable is most likely to occur when participants are selected...
1. Ifa study includes random assignment but not a control group, the design may still be...
1. Ifa study includes random assignment but not a control group, the design may still be considered to be a true experimental design. True a. b. False Using control groups help account for which of the following threats to internal validity except? 2. History a. b. Testing Maturation c. None of the above d. If the results of a study determine that an intervention did not work, though for reasons not related to the intervention, the 3. study would have...
differences can substantially enefit only occurs if the Pla We 6:00 reduce variance and lower the...
differences can substantially enefit only occurs if the Pla We 6:00 reduce variance and lower the standard error. However, thi individual differences are consistent across treatment conditions. In problem 21, for example, the particlpants with the highest scores in the more-sleep condition also had the Mini Wec 6:00 sche apol inco highest scores in the less-sleep condition. Similarly, participants with the the first condition also had the lowest scores in the second condition. To construct the st scores in following...
An advantage of a within-subjects design as compared to a between-subjects design is... a. All of these options. b. it eliminates the threat that participant characteristics may become a confounding variable. c. it reduces the variability by subtracting out the individual differences. d. it usually requires fewer participants.
For a between-subjects experiment, the primary threat to internal validity is... a. Holding variables constant. b. Restricting a variables' range. c. It requires extensive efforts to counterbalance conditions. d. The groups may be different from each other on key characteristics.
6. Typically, when comparing a within-subjects design to a between-groups design which of the following describe their differences in error variance? a. Within-subjects designs results in less error variance than between-groups. b. A within-subjects design results in more error variance than a between-groups design. C. A within-subjects design results in the same amount of error variance as a between-groups design d. There is no error variance in a within-subjects design, whereas a between- groups design does present some error variance....
Why is random assignment used in between-subjects experimental designs? a. To increase the variance within the groups. b. To eliminate systematic differences between the groups. c. To manipulate the independent variable. d. To avoid volunteerism.
answer all please
In an analysis of variance, the MS between and MS within represent the means of the squared variability between and within conditions. True • False QUESTION 14 If an analysis of variance produces SS between 30 and MS between 10, then the ANOVA is comparing three treatment conditions. True False QUESTION 15 Compared to an independent measures design a repeated measures study is more likely to find a statistically significant effect because it reduces the contribution of...
A within-subjects design is to the whereas a between-subjects design is to the a. Repeated-measures ANOVA; One-way ANOVA. b. One-way ANOVA; Chi-square test for independence, c. One-way ANOVA; Repeated-measures ANOVA. d. Dependent samples t-test; Repeated-measures ANOVA
Dr. Strange is attempting to counterbalance his within-subjects research design that has 3 conditions, but he isn't sure whether to use complete or partial counterbalancing. If Dr. Strange uses complete counterbalancing he would have groups, whereas if he uses partial counterbalancing he would have groups. In this example, groups = number of orders of treatment conditions. a. 6;3 b. 3; 6 c. 9,5 d. Cannot answer without more information
1. Ifa study includes random assignment but not a control group, the design may still be considered to be a true experimental design. True a. b. False Using control groups help account for which of the following threats to internal validity except? 2. History a. b. Testing Maturation c. None of the above d. If the results of a study determine that an intervention did not work, though for reasons not related to the intervention, the 3. study would have...
differences can substantially enefit only occurs if the Pla We 6:00 reduce variance and lower the standard error. However, thi individual differences are consistent across treatment conditions. In problem 21, for example, the particlpants with the highest scores in the more-sleep condition also had the Mini Wec 6:00 sche apol inco highest scores in the less-sleep condition. Similarly, participants with the the first condition also had the lowest scores in the second condition. To construct the st scores in following...
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