Coend's d Calculation and Interpretation

This tutorial introduces Coend effect size, explaining its significance and how to interpret it. The video covers the calculation of Coend's D using group means and standard deviations, and discusses how to handle cases where standard deviations are unequal. An example calculation is provided to illustrate the process, and the tutorial concludes with a summary of key points.

What is the primary focus of the tutorial on Coend effect size?

• Comparison with other statistical measures

• Advanced statistical methods

• Introductory information, interpretation, and calculation

• Historical background of Coend

In the context of Coend effect size, what is a control group?

• A group that is used to measure the effect size

• A group that does not receive the experimental treatment

• A group that is irrelevant to the study

• A group that receives the experimental treatment

How is the shift in means between two groups measured?

• In percentages

• In absolute numbers

• In ratios

• In standard deviations

What is the formula for calculating Coend's d?

• Mean of control group minus mean of experimental group divided by standard deviation

• Mean of experimental group minus mean of control group divided by standard deviation

• Sum of means of both groups divided by standard deviation

• Difference of means of both groups multiplied by standard deviation

What assumption is made about standard deviations in the initial calculation of Coend's d?

• They are averaged

• They are ignored

• They are equal

• They are unequal

What is the importance of taking the absolute value in Coend's d calculation?

• To ensure a negative result

• To ensure a positive result

• To ignore the standard deviation

• To complicate the calculation

What is considered a small effect size in Coend's d?

• Less than 0

• Between 0 and 0.20

• Between 0.20 and 0.50

• Greater than 0.50

What is the effect size when Coend's d is between 0.20 and 0.50?

• Medium

• No effect

• Small

• Large

How do you handle unequal standard deviations when calculating Coend's d?

• Use the larger standard deviation

• Use the smaller standard deviation

• Average the two standard deviations

• Ignore the standard deviations

What is the first step in calculating Coend's d when standard deviations are unequal?

• Subtract the means

• Add the standard deviations

• Multiply the standard deviations

• Average the standard deviations