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My psych cards > statistics and research design > Flashcards

statistics and research design Flashcards

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0
Q

What is a Type 2 error?

A

False null hypothesis accepted

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1
Q

What is a Type 1 error?

A

True null hypothesis rejected

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2
Q

Ratio IQ Equation

A

IQ= (mental age)
___________ X 100
(Chronological age)

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3
Q

Mental Age

A

IQ (chronological age)
___________________
100

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4
Q

Deviation IQ

A

how well a person performed on an IQ test relative to same age peer

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5
Q

Types of Validity

A 
Content
Criterion
Construct
Predictive
Convergent
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6
Q

Content Validity

A

(determined before test is administered)

items adequately sample skill or trait being measured

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7
Q

Criterion Validity

A

how well can test predict future performance in specific field

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8
Q

Construct Validity

A

performance is correlated with other items theory predicts it is related to

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9
Q

Predictive Validity

A

Criterion

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10
Q

Convergent Validity

A

Construct Validity

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11
Q

Nominal data

A

Categorical (names)

Ex) Democrat/ Republican

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12
Q

Ordinal Data

A

Ranks (order horses finish in races)

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13
Q

Interval Data

A

Actual Numbers

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14
Q

Ratio Data

A

True 0 Point

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15
Q

Independent Variable

A

Variable whose effect is being studied

16
Q

Dependent Variable

A

Variable expected to change due to IV change

17
Q

Standard Deviation (SD)

A

’s - mean–> absolute value, square, add them all together, divide by # of #’s and find square root

average scatter away from mean/ square root of variance

18
Q

Variance

A

- mean, add absolute values, divide by # of #s

Standard Deviation squared

19
Q

T-Score

A

mean= 50, sd= 10

20
Q

z score

A

how many standard deviations above/ below the mean is your score

= your score- mean of distribution
______________________________
standard deviation

21
Q

What kind of data?

A

Amounts (numbers)- how many groups?
2: T-Test
More than 2: ANOVA

Categories: Chi-Square Test

22
Q

Tests can be interpreted ______

A

Norm-referenced testing

  • –> assess individual’s performance in reference to others
    problem: population of test takers can change

Domain-referenced testing (criterion)

  • –> assess what test taker knows about specific content domain
    ex) driver’s test

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