Question

Correlations between recognition performance and sleep parameters showed that in the sleep condition overall mem ory accuracy

For the first correlation reported in the results section 3.3:

  1. Is the correlation statistically significant?

Also whats the importance of this study? Thank you!

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Answer #1

This is a simple problem related to making an inference about the significance of the memory to hte kind of sleep on a given level of confidence.

Clealry if we take the first corrleation case ,we can see that all the correlations between memory and the REM sleep types is siginificant at 90% confidence interval.

i.e, we can say that there exisits a very strong correlation between memory and REM sleep type with a 90 % confidence

But why did we choose the 90 % confidence interval and not 95 5 or 99 %?

This is so because the section 3.3 says that all the given correlations are siginificiant eith a given values whilch are <0.10 (which is the borderline cut off limit for 90% confidence limit.

Thus if we check for the correlations between all the given factors in 3.3 we will get the following which gives us a complete picture of correlation significance between variaous variables with each other.

Correlation between a(alpha)
S.No. Memory accurancy Sleep type Correlation Inference p value p value <a? Inference
1 Memory accuracy NonREM Sleep 0.79 Positive correaltion. As one inceases other also incereaes 0.07 yes The correlation is siginificant with 90 % conifdence
2 hit rate NonREM Sleep 0.36 Positive correaltion. As one inceases other also incereaes 0.31 No The correlation is NOT siginificant with 90 % conifdence
3 false alarm NonREM Sleep -0.42 Negative correlation as one variable increases other decreases 0.23 No The correlation is NOT siginificant with 90 % conifdence
4 Memory accuracy when angry NonREM Sleep 0.79 Positive correaltion. As one inceases other also incereaes 0.006 yes The correlation is siginificant with 90 % conifdence
5 Memory accuracy when happy NonREM Sleep 0.86 Positive correaltion. As one inceases other also incereaes 0.001 yes The correlation is siginificant with 90 % conifdence
6 Memory accuracy when neutral NonREM Sleep 0.03 Positive correaltion. As one inceases other also incereaes 0.93 No The correlation is NOT siginificant with 90 % conifdence
7 Memory accuracy when angry after learning NonREM Sleep 0.66 Positive correaltion. As one inceases other also incereaes 0.037 yes The correlation is siginificant with 90 % conifdence
8 Memory accuracy when happy after learning NonREM Sleep 0.61 Positive correaltion. As one inceases other also incereaes 0.063 yes The correlation is siginificant with 90 % conifdence
9 Memory accuracy when neutral after learning NonREM Sleep 0.11 Positive correaltion. As one inceases other also incereaes 0.76 No The correlation is NOT siginificant with 90 % conifdence
10 Memory accuracy after learning NonREM Sleep 0.65 Positive correaltion. As one inceases other also incereaes 0.042 yes The correlation is siginificant with 90 % conifdence
11 Memory accuracy REM sleep -0.53 Negative correlation as one variable increases other decreases 0.116 No The correlation is NOT siginificant with 90 % conifdence
12 Memory accuracy when False alarm REM sleep 0.59 Positive correaltion. As one inceases other also incereaes 0.072 yes The correlation is siginificant with 90 % conifdence
13 Reaction time of old faces REM sleep -0.76 Negative correlation as one variable increases other decreases 0.012 yes The correlation is siginificant with 90 % conifdence
14 Reaction time of freash faces REM sleep -0.02 Negative correlation as one variable increases other decreases 0.95 No The correlation is NOT siginificant with 90 % conifdence
15 Implicite memory REM sleep -0.7 Negative correlation as one variable increases other decreases 0.024 yes The correlation is siginificant with 90 % conifdence
16 Implicite memory when angry REM sleep -0.54 Negative correlation as one variable increases other decreases 0.108 No The correlation is NOT siginificant with 90 % conifdence
17 Implicite memory when happy REM sleep -0.54 Negative correlation as one variable increases other decreases 0.108 No The correlation is NOT siginificant with 90 % conifdence
Implicite memory when neutral REM sleep -0.59 Negative correlation as one variable increases other decreases 0.071 yes The correlation is siginificant with 90 % conifdence
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