2022-2024 Year 13 A-Level Psychology - Research Methods: Probability & Significance
This flashcard set focuses on probability and significance in A-Level Psychology (Research Methods), helping students understand how to interpret statistical tests, locate critical values, and apply the conventional 0.05 significance level used in psychological research.
When interpreting a statistical test. Where is the critical value found?
In the table provided
Key Terms
When interpreting a statistical test. Where is the critical value found?
In the table provided
What is the conventional level of significance in psychology?
0.05/5%
To identify the critical value what do we need to know?
One or two tailed test
Number of participants (N) or Degrees of freedom (df)
Significance level
In the sign test the calculated value is the ….
least frequent sign
If the research is not significant which hypothesis do you accept and reject?
Accept the null hypothesis and reject the alternative hypothesis
If the research is significant which hypothesis do you accept and reject?
Accept the alternative hypothesis and reject the null hypothesis
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| Term | Definition |
|---|---|
When interpreting a statistical test. Where is the critical value found? | In the table provided |
What is the conventional level of significance in psychology? | 0.05/5% |
To identify the critical value what do we need to know? | One or two tailed test |
In the sign test the calculated value is the …. | least frequent sign |
If the research is not significant which hypothesis do you accept and reject? | Accept the null hypothesis and reject the alternative hypothesis |
If the research is significant which hypothesis do you accept and reject? | Accept the alternative hypothesis and reject the null hypothesis |
If a researcher uses a lenient p-value. Which error may they make? | Type one error |
If a researcher uses a strict p-value. Which error may they make? | Type two error |
What may the researcher think if they make a type one error? | Think the results are significant when they are not |
What may the researcher think if they make a type two error? | Think the results are not significant when they are |
In a type one error which hypothesis does a researcher wrongly accept and reject? | Wrongly accept the alternative hypothesis and reject the null hypothesis |
In a type two error which hypothesis does a researcher wrongly accept and reject? | Wrongly accept the null hypothesis and reject the alternative hypothesis |
How do you check for a type one error? | Go to a stricter level of significance. If it stays significant there is no error. if it becomes not significant there is an error |
How do you check for a type two error? | Go to a lenient level of significance. If it stays not significant there is no error. if it becomes significant there is an error |
Which significance level strikes the balance between making a type one or type two error? | 0.05/5% |
The researcher conducted one-tailed test, with 1 degree of freedom with a level of significance of 5%. The calculated value was 3.98. Explain if the research is significant and which hypothesis is accepted? | Significant |
The researcher used a one tailed test, the significance level is 2.5% and the sample size was 37. Explain if the research is significant when the calculated value was 90. | Not significant |
The sample size was 18 and the significance level was 5% using a non-directional hypothesis. The calculated value was -0.472. Explain whether the research is significant. | Significant |