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9.
Which of the following designs would result in the greatest
statistical power?
within-groups (repeated measures)
between-groups with matched groups
All designs are equal in statistical power.
between-groups with random assignment
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contrasting a repeated measures research design with matched
subjects and independent measures designs
A graduate student is interested in whether journaling can affect grief and healing. She has participants who have been widowed within the past 10-14 months complete a battery of psychological questionnaires before and after journaling about their daily problems for 2 months. The first time the graduate student conducted this study, she used a repeated-measures design and compared the widows' and widowers' baseline scores with their scores...
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One way to increase the statistical power within a
between-groups design is to:
have each participant contribute two data points per
condition.
match participants on a variable of interest and have similar
people participate in a different level of the independent
variable.
have each participant serve in all conditions of the
study.
use planned comparisons to analyze the results rather than an
F test.
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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....
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5. A two-tailed hypothesis test for a repeated-measures design A graduate student is interested in whether jounaling can affect grief and healing. For her study, she selects a random sample of 64 adults who have been widowed within the past 10 to 14 months. The subjects complete a battery of psychological questionnaires before and after spending two months journaling about their emotions. Before the two months of journaling, the mean score on the impact of event scale-avoidance subscale, which measures...
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Looking for some help with this stats problem - will give good
reviews!
Attempts Average: /19 10. Comparing repeated-measures ANOVA to independent-measures ANOVA Aa Aa You are interested in studying how formal language exposure and deafness affect language acquisition. You want to compare three groups: a hearing group, a deaf group that began learning American Sign Language (ASL) before age 1, and a deaf group that did not begin learning ASL until age 1. You are trying to decide whether...
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A two-talled hypothesis test
for a repeated-measures research design A graduate student is
interested in whether journaling can affect grief and healing. For
his study, he selects a randor sample of 64 adults who have been
widowed within the past 10 to 14 months. The subjects complete a
battery or psychological questtonnalres before and after spending
two months Journaling about their emotions. Before the two months
of journaling, the mean score on the impact of event
scale-avoidance subscale, which measures...
-
The Open Science movement seeks to help fix the replication
crisis. How?
A. By encouraging open data—that way scientists can check each
other’s work.
B. By encouraging open materials—that way it will be easier and
more common to conduct replications.
C. By encouraging preregistration—that way it will be more clear
what analyses are exploratory vs. planned, and researchers will not
be able to ‘p-hack’.
D. All of the above Whitney is planning a replication of a
previously published study.
The...
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6. A two-tailed hypothesis test for a repeated-measures research design Previous studies have shown that playing video games can increase visual perception abilities on tasks presented in the gaming zone of the screen (within 5 degrees of the center). A graduate student is interested in whether playing video games increases peripheral visual perception abilities or decreases attention to peripheral regions because of focus on the gaming zone. For his study, he selects a random sample of 81 adults. The subjects...
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Lesson:
-Factorial designs have more than one independent variable or
factors.
-A two way factorial design has two independent variables, a
three-way factorial design has three independent variables and so
forth.
-A 2x2 design has two factors and two levels of each.
-A 2x3 design also has two factors but one has two levels and
one has three.
-A 3x3 design has two factors and each factor has 3 levels.
Each example has 2 independent variables or factors.
Comparison of...
contrasting a repeated measures research design with matched
subjects and independent measures designs
A graduate student is interested in whether journaling can affect grief and healing. She has participants who have been widowed within the past 10-14 months complete a battery of psychological questionnaires before and after journaling about their daily problems for 2 months. The first time the graduate student conducted this study, she used a repeated-measures design and compared the widows' and widowers' baseline scores with their scores...
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....
5. A two-tailed hypothesis test for a repeated-measures design A graduate student is interested in whether jounaling can affect grief and healing. For her study, she selects a random sample of 64 adults who have been widowed within the past 10 to 14 months. The subjects complete a battery of psychological questionnaires before and after spending two months journaling about their emotions. Before the two months of journaling, the mean score on the impact of event scale-avoidance subscale, which measures...
Looking for some help with this stats problem - will give good
reviews!
Attempts Average: /19 10. Comparing repeated-measures ANOVA to independent-measures ANOVA Aa Aa You are interested in studying how formal language exposure and deafness affect language acquisition. You want to compare three groups: a hearing group, a deaf group that began learning American Sign Language (ASL) before age 1, and a deaf group that did not begin learning ASL until age 1. You are trying to decide whether...
A two-talled hypothesis test
for a repeated-measures research design A graduate student is
interested in whether journaling can affect grief and healing. For
his study, he selects a randor sample of 64 adults who have been
widowed within the past 10 to 14 months. The subjects complete a
battery or psychological questtonnalres before and after spending
two months Journaling about their emotions. Before the two months
of journaling, the mean score on the impact of event
scale-avoidance subscale, which measures...
6. A two-tailed hypothesis test for a repeated-measures research design Previous studies have shown that playing video games can increase visual perception abilities on tasks presented in the gaming zone of the screen (within 5 degrees of the center). A graduate student is interested in whether playing video games increases peripheral visual perception abilities or decreases attention to peripheral regions because of focus on the gaming zone. For his study, he selects a random sample of 81 adults. The subjects...