All Together now ...HELLSCAPE! Flashcards
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Which method of measuring brain activity can cause a small area of the brain to be ‘switched on and off’ at will?
Transcranial Magnetic Stimulation
What is the correct order of the neural impulse?
Dendrites; Cell Body; Axon; Axon Terminals
How many chromosomes are there in the nucleus of a normal human cell (ie, NOT a sex cell)?
46 (23 from the mother and 23 from the father)
What is meant by a ‘recessive’ allele in genetics?
A gene variant that requires both versions to be present in order to be displayed
when is the heritability estimate for intelligence the highest?
in adulthood than in
If a trait has a heritability estimate of 0.2, this means
20% of variation in the expression of that trait is due to genetics
Which is the correct pairing of nucleotides?
G-C, A-T
Adenine, guanine, thymine, and cytosine are:
Nucleotides
What is the correct definition of a heritability estimate?
Statistical indicator of genetic influence on a trait
How do we get a t-distribution?
By repeatedly taking two samples from the same population and then taking the mean difference between the two samples.
All other things being equal, when are we more likely to get a statistically significant difference between two conditions?
When we have a smaller standard deviation.
What is the fundamental idea underlying statistical tests that compare the results from two observed samples?
The tests compare the difference between the observed samples with a distribution that is based on a comparison of two random samples.
If we find no significant difference between two conditions what can we conclude?
There is no evidence that the two samples came from different populations.
If we set our significance level at .05 and a statistical test shows that p = .062, what should we say?
The result is non-significant.
What does the t-test NOT take into account?
The difference in medians between your samples.
What does the Levene’s test for equality of variances tell you?
Whether the homogeneity of variance assumption is violated.
When do you use a related samples t-test?
When each participant contributed data in two conditions.
You therefore design a study to investigate if there is a difference between student and staff satisfaction of the new common room. Which experimental design and statistical tests would you use?
Independent samples design and independent samples t-test
how do you report the results of the t-test.
t(degress of freedom) = the t statistic, p = p value
When do we make a Type I error?
We reject the null hypothesis when the null hypothesis is in fact true.
What does the MS-between in an independent samples ANOVA tell us?
How large the differences between conditions are.
Which test checks whether the sphericity assumption in a repeated measures ANOVA is violated?
Mauchly’s test
how do you report the results of an analysis of variance
An ANOVA showed that there were significant differences between the conditions: F(2, 27) = 4.47, p = .021
What is the dependent Variable
The data that your participants provide, the variable that you measure, e.g., reaction times, score on a test, ratings, number of errors, etc.