Experimental Psychology

Question 1

What are the three types of psychological research strategies?

Answer 1

Descriptive research
Predictive research
Explanatory research

Question 2

What kind of psychological research is used for experimental method?

Answer 2

Explanatory research

Question 3

What is kurtosis?

Answer 3

The shape of the distribution

Question 4

If I have a set of ordinal data that included extreme score, which measure of enteral tendency should be used?

Answer 4

The median

Question 5

What are the two comparisons made in a one sample z-score?

Answer 5

Comparing a group to a population

Question 6

What is a disadvantage as using the mean as a measure of central tendency?

Answer 6

It is effected by extreme scores

Question 7

Estimates of the mean, median, mode and standard deviation for the population are known as what?

Answer 7

Parameters

Question 8

Describe the mean absolute deviance?

Answer 8

How far away a particular score is from the mean, but does not included a direction

Question 9

Describe a population?

Answer 9

The set of scores we are interested in on any given variable

Question 10

What are the types of non probability samples?

Answer 10

Convenience sampling
Quota sampling
Purpose sampling
Snowball sampling

Question 11

What is standard error?

Answer 11

The standard deviation of a large group of means.

Question 12

What is a confident interval?

Answer 12

A range in which the parameter is likely to fall into. Usually around 95%

Question 13

What is power?

Answer 13

The probability of correctly rejection a false null hypothesis

Question 14

What is the sampling distribution of the mean?

Answer 14

The distribution you would get if you drew an infinite number of samples for the population and calculated the mean for each

Question 15

What is the only time when z-scores should be used?

Answer 15

When the population mean and standard deviation are known.

Question 16

How do you calculate standard deviation for a t-test?

Answer 16

By making an estimate based on our sample standard deviation.

Question 17

What are degrees of freedom?

Answer 17

Where the sample size is compared against the t-table

Question 18

Describe what a z score is

Answer 18

A mean score versus the population mean, relative to the population standard deviation

Question 19

What is the difference between a one sample t test and a paired sample t test?

Answer 19

One sample t test compares two scores. A paired samples t test compares the difference between two scores, as the same people are measured twice

Question 20

What is the difference between an independent samples t test and a paired samples t test?

Answer 20

An independent samples t test is the means of group one versus the mean of group two. A paired samples t test it the difference is score pre and post.

Question 21

What types of data are used for parametric tests?

Answer 21

Interval or ratio data

Question 22

Describe the central limit theorem

Answer 22

• Is what is used to find the mean and standard deviation of the sample distribution.

Question 23

How does central limit theorem explain how to calculate the standard deviation of the sample distribution?

Answer 23

The standard deviation of a sample distribution is the population standard deviation, divided by the square root of N

Question 24

What is standard error of the mean?

Answer 24

The standard distribution of the sampling distribution of the mean

Question 25

Explains the conceptual model of the one way between subjects ANOVA.

Answer 25

You = the population mean + the effective of the treatment group + the difference between your score and the group mean (part special to you)

Question 26

When would you conduct a one way ANOVA?

Answer 26

When your IV had more than two levels

Question 27

Describe MS error

Answer 27

Is an estimate of the population variance, which is not affected by the null hypothesis

Question 28

Describe MS treatment?

Answer 28

Another measure of population variance, however assumes that the null hypothesis is true. Also includes the effect of the treatment

Question 29

How is the F value calculated?

Answer 29

MS treatment divided by MS error

Question 30

How is eta-squared calculate?

Answer 30

SS treatment divided by SS total (on SPSS output)

Question 31

What are the two types of post hoc tests used in this unit

Answer 31

S-N-K and Scheffe

Question 32

Describe familywise error rate

Answer 32

The higher probability of a type 1 error when running many comparisons

Question 33

When does cohens D need to be calculated?

Answer 33

In an independent samples t-test

Question 34

Describe a one way repeated measures ANOVA

Answer 34

When there are more than two or more levels of one IV and it is manipulated within subjects

Question 35

What is the most significant advantage of using a one way repeated measures ANOVA?

Answer 35

It is easier to find a significant difference by measure the same people twice

Question 36

What is the difference in error rates between one way between subject ANOVA and repeated measures ANOVA?

Answer 36

Error size can be reduced in a repeated measures ANOVA, by removing the contribution made by individual differences

Question 37

Describe the structural model of a one way repeated measures ANOVA

Answer 37

Score = overall mean + the fact that they're measures twice + the effect of the condition they're in + the bit that is specific for that person AT that treatment level

Question 38

What does individual difference refer to in a one way repeated measures ANOVA

Answer 38

Because we are able to measure people twice, we can calculated characteristics that are specific to them

Question 39

The variation between one group of scores should be approximately equal to the variability of any other group of scores. What is this?

Answer 39

Sphericity

Question 40

Describe a factorial ANOVA

Answer 40

For experimental designs that have more than one IV

Question 41

What are the three types of factorial ANOVAs

Answer 41

Between subjects Within subjects Mixed

Question 42

How many levels of MS treatment are calculated in a between groups factorial ANOVA with two IV's

Answer 42

3 - one for each IV and another for the interaction

Question 43

What is used to follow up a significant interaction

Answer 43

Syntax (MANOVA)

Question 44

What follow up test would be used for a factorial mixed groups ANOVA when the interaction was significant

Answer 44

The file would be split, and a t test would be conducted if the IV only had two levels. If it had more levels a one way ANOVA