7.2: Reliability Flashcards
Over the course of the six-week treatment, each patient’s mood was monitored every week using a self-report mood scale (where a score of 20 = extremely positive mood and a score of 0 = extremely negative mood).
Each week they also completed a quality of sleep questionnaire which was scored from 10 = excellent sleep to 0 = very poor sleep.
At the end of the study, the researchers correlated each patient’s final mood score with his or her final sleep score.
The results are a scattergram to show the relationship between final mood scores and final sleep scores for 20 patients at the end of therapy, showing a positive correlation.
The sleep questionnaire used by the researchers had not been checked to see whether or not it was a reliable measure of sleep quality.
Explain how this study could be modified by checking the sleep questionnaire for test-retest reliability (4 marks)
The same participants would complete the sleep questionnaire on more than one occasion
Over the course of the six-week treatment, each patient’s mood was monitored every week using a self-report mood scale (where a score of 20 = extremely positive mood and a score of 0 = extremely negative mood).
Each week they also completed a quality of sleep questionnaire which was scored from 10 = excellent sleep to 0 = very poor sleep.
At the end of the study, the researchers correlated each patient’s final mood score with his or her final sleep score.
The results are a scattergram to show the relationship between final mood scores and final sleep scores for 20 patients at the end of therapy, showing a positive correlation.
The sleep questionnaire used by the researchers had not been checked to see whether or not it was a reliable measure of sleep quality.
Explain how this study could be modified by checking the sleep questionnaire for test-retest reliability (4 marks).
The same participants would complete the sleep questionnaire on more than one occasion.
What should happen to each participants’ scores from the first occasion?
Each participants’ scores from the first occasion should be correlated with his or her results from the later occasion
Over the course of the six-week treatment, each patient’s mood was monitored every week using a self-report mood scale (where a score of 20 = extremely positive mood and a score of 0 = extremely negative mood).
Each week they also completed a quality of sleep questionnaire which was scored from 10 = excellent sleep to 0 = very poor sleep.
At the end of the study, the researchers correlated each patient’s final mood score with his or her final sleep score.
The results are a scattergram to show the relationship between final mood scores and final sleep scores for 20 patients at the end of therapy, showing a positive correlation.
The sleep questionnaire used by the researchers had not been checked to see whether or not it was a reliable measure of sleep quality.
Explain how this study could be modified by checking the sleep questionnaire for test-retest reliability (4 marks).
The same participants would complete the sleep questionnaire on more than one occasion.
Each participants’ scores from the first occasion should be correlated with his or her results from the later occasion to be shown where?
Each participants’ scores from the first occasion should be correlated with his or her results from the later occasion to be shown on a scattergraph to describe the correlation
Over the course of the six-week treatment, each patient’s mood was monitored every week using a self-report mood scale (where a score of 20 = extremely positive mood and a score of 0 = extremely negative mood).
Each week they also completed a quality of sleep questionnaire which was scored from 10 = excellent sleep to 0 = very poor sleep.
At the end of the study, the researchers correlated each patient’s final mood score with his or her final sleep score.
The results are a scattergram to show the relationship between final mood scores and final sleep scores for 20 patients at the end of therapy, showing a positive correlation.
The sleep questionnaire used by the researchers had not been checked to see whether or not it was a reliable measure of sleep quality.
Explain how this study could be modified by checking the sleep questionnaire for test-retest reliability (4 marks).
The same participants would complete the sleep questionnaire on more than one occasion.
Each participants’ scores from the first occasion should be correlated with his or her results from the later occasion to be shown on a scattergraph to describe the correlation, how?
Each participants’ scores from the first occasion should be correlated with his or her results from the later occasion to be shown on a scattergraph to describe the correlation, with scores from the first test plotted on one axis and the scores from the second test plotted on the other axis
Over the course of the six-week treatment, each patient’s mood was monitored every week using a self-report mood scale (where a score of 20 = extremely positive mood and a score of 0 = extremely negative mood).
Each week they also completed a quality of sleep questionnaire which was scored from 10 = excellent sleep to 0 = very poor sleep.
At the end of the study, the researchers correlated each patient’s final mood score with his or her final sleep score.
The results are a scattergram to show the relationship between final mood scores and final sleep scores for 20 patients at the end of therapy, showing a positive correlation.
The sleep questionnaire used by the researchers had not been checked to see whether or not it was a reliable measure of sleep quality.
Explain how this study could be modified by checking the sleep questionnaire for test-retest reliability (4 marks).
The same participants would complete the sleep questionnaire on more than one occasion.
Each participants’ scores from the first occasion should be correlated with his or her results from the later occasion to be shown on a scattergraph to describe the correlation, with scores from the first test plotted on one axis and the scores from the second test plotted on the other axis.
What should then be assessed?
The strength of the correlation should then be assessed
Over the course of the six-week treatment, each patient’s mood was monitored every week using a self-report mood scale (where a score of 20 = extremely positive mood and a score of 0 = extremely negative mood).
Each week they also completed a quality of sleep questionnaire which was scored from 10 = excellent sleep to 0 = very poor sleep.
At the end of the study, the researchers correlated each patient’s final mood score with his or her final sleep score.
The results are a scattergram to show the relationship between final mood scores and final sleep scores for 20 patients at the end of therapy, showing a positive correlation.
The sleep questionnaire used by the researchers had not been checked to see whether or not it was a reliable measure of sleep quality.
Explain how this study could be modified by checking the sleep questionnaire for test-retest reliability (4 marks).
The same participants would complete the sleep questionnaire on more than one occasion.
Each participants’ scores from the first occasion should be correlated with his or her results from the later occasion to be shown on a scattergraph to describe the correlation, with scores from the first test plotted on one axis and the scores from the second test plotted on the other axis.
The strength of the correlation should then be assessed, how?
The strength of the correlation should then be assessed, using either a Spearman’s rho test or a Pearson’s r test
Over the course of the six-week treatment, each patient’s mood was monitored every week using a self-report mood scale (where a score of 20 = extremely positive mood and a score of 0 = extremely negative mood).
Each week they also completed a quality of sleep questionnaire which was scored from 10 = excellent sleep to 0 = very poor sleep.
At the end of the study, the researchers correlated each patient’s final mood score with his or her final sleep score.
The results are a scattergram to show the relationship between final mood scores and final sleep scores for 20 patients at the end of therapy, showing a positive correlation.
The sleep questionnaire used by the researchers had not been checked to see whether or not it was a reliable measure of sleep quality.
Explain how this study could be modified by checking the sleep questionnaire for test-retest reliability (4 marks).
The same participants would complete the sleep questionnaire on more than one occasion.
Each participants’ scores from the first occasion should be correlated with his or her results from the later occasion to be shown on a scattergraph to describe the correlation, with scores from the first test plotted on one axis and the scores from the second test plotted on the other axis.
The strength of the correlation should then be assessed, using either a Spearman’s rho test or a Pearson’s r test.
How is the degree of reliability then determined?
The degree of reliability is then determined by comparing the correlation with the statistical table to determine the extent of correlation
Over the course of the six-week treatment, each patient’s mood was monitored every week using a self-report mood scale (where a score of 20 = extremely positive mood and a score of 0 = extremely negative mood).
Each week they also completed a quality of sleep questionnaire which was scored from 10 = excellent sleep to 0 = very poor sleep.
At the end of the study, the researchers correlated each patient’s final mood score with his or her final sleep score.
The results are a scattergram to show the relationship between final mood scores and final sleep scores for 20 patients at the end of therapy, showing a positive correlation.
The sleep questionnaire used by the researchers had not been checked to see whether or not it was a reliable measure of sleep quality.
Explain how this study could be modified by checking the sleep questionnaire for test-retest reliability (4 marks).
The same participants would complete the sleep questionnaire on more than one occasion.
Each participants’ scores from the first occasion should be correlated with his or her results from the later occasion to be shown on a scattergraph to describe the correlation, with scores from the first test plotted on one axis and the scores from the second test plotted on the other axis.
The strength of the correlation should then be assessed, using either a Spearman’s rho test or a Pearson’s r test.
The degree of reliability is then determined by comparing the correlation with the statistical table to determine the extent of correlation.
What should there be?
There should be a strong positive correlation between the 2 sets of scores
Briefly explain two reasons why it is important for research to be replicated (4 marks)
One reason why it is important for research to be replicated is because the likelihood of the same differences occurring twice (or more), by chance alone are much smaller than when they occur the first time
Briefly explain two reasons why it is important for research to be replicated (4 marks).
One reason why it is important for research to be replicated is because the likelihood of the same differences occurring twice (or more), by chance alone are much smaller than when they occur the first time.
Another reason why it is important for research to be replicated
Another reason why it is important for research to be replicated is that the effects that occur in a study are more likely to be reliable if they occur in a repeat of the study
Briefly explain two reasons why it is important for research to be replicated (4 marks).
One reason why it is important for research to be replicated is because the likelihood of the same differences occurring twice (or more), by chance alone are much smaller than when they occur the first time.
Another reason why it is important for research to be replicated is that the effects that occur in a study are more likely to be reliable if they occur in a repeat of the study – what does replication therefore do?
Another reason why it is important for research to be replicated is that the effects that occur in a study are more likely to be reliable if they occur in a repeat of the study – replication therefore increases (external) reliability
