Measurement Flashcards

1
Q

Measurement

A

Assignment of scores to individuals so that the scores represent some characteristic of the individuals

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2
Q

Psychometrics

A

General definition of measurement in psychology

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3
Q

Conceptual definition

A

Psychological construct describes the behaviours and internal processes that up that construct, along with how it relates to other variables

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4
Q

Operational Definition

A

Definition of a variable in terms of precisely how is is to be measured

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5
Q

Self report measures

A

Are those in which participants report their own thoughts, feelings, and actions

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6
Q

Behavioural measures

A

Are those in which some other aspect of participants behaviour is observed and recorded

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7
Q

Physiological measures

A

Measuring of physiological processes like heart rate, respiratory rate

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8
Q

Converging Operations

A

Multiple operational definitions coming together

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9
Q

Levels of measurement

A

There are 4 of them
Nominal
Ordinal
Interval
Ratio

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10
Q

Nominal Level

A

Measurement is used for categorical variables and involves assigning scores that are category labels

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11
Q

The measurement process

A

Constructs, definitions, measures

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12
Q

Levels of variables

A

Nominal
Ordinal
Interval
Ratio

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13
Q

What is German mathematician carl Friedrich gauss say

A
  1. Knowledge and Chance
  2. Chance “the enemy of all knowledge, overcome”
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14
Q

Louis Agassiz

A

zoologist: Classify humans by moral + physical traits

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15
Q

Measurement

A

Giving numerical value to some phenomenon

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16
Q

“Constructs”

A

Measure tendencies over time that are not directly observable. can be complex, can consist of personality
Qualitative meaurements

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17
Q

Example of constructs

A

Extraversion = outgoing, enjoy social interactions

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18
Q

Conceptual Definition

A

may describe behaviours and internal processes making up that construct
More variable

19
Q

Operational Definitions

A

Defining how to precisely measure a construct
More specific

20
Q

Example of operational definitions

A

Self report measures: report on own thoughts, feelings, actions

21
Q

Behavioural measures

A

Alternative approach to avoid the subjective nature of questionnaires: measure participants responses that are produced automatically

22
Q

Physiological measures

A

Recording measures such as heart rate, blood pressure, cortisol levels

23
Q

2 conditions of categorical variables

A
  1. Categories are mutually exclusive
  2. Categories must be collectively exhaustive
24
Q

Discrete variable

A

the answer is constrained to be a whole number, can’t take on any value between the whole number

25
Q

Continuous variable

A

Can assume any reasonable value

26
Q

Nominal measurement

A

Yes/No answers

27
Q

Ordinal measurement

A

you know the order but not the distances/intervals between the categories. You cannot add or subtract

28
Q

Example of Ordinal measurement

A

Linkert scale

29
Q

interval measurement

A

Distances/intervals are the same between the values. But no true 0

30
Q

Ratio measurements

A

Most precise, ranging from an absolute 0 to infinity

31
Q

Phase 1 of Scale Development

A

Item Development
1. Identification of Domain and item generation
2. Content validity

32
Q

Phase 2 of Scale Development

A

Pre testing of questions
Sampling and survey administration
Item reduction
Understanding how many factors the scale captures `

33
Q

Phase 3 is scale evaluation

A

Tests of the number of dimensions
Tests of reliability is tested
Tests of validity

34
Q

Reliability

A

A scale’s ability to produce consistent results over time under consistent conditions

35
Q

Reliability coefficient

A

0 to 1

36
Q

Reliability coefficient is effected by

A

Random error

37
Q

How can reliability can be determined

A

Over time
Across different researchers
Parallel forms of reliability
Internal consistency

38
Q

Content validity

A

Does a scale measure what it is supposed to measure

39
Q

Face validity

A

Extent to which a scale measures a construct on its face

40
Q

Criterion validity

A

Extent to which scored on a measure are correlated with other variables

41
Q

Discrimant validity

A

Extent to which variables that are not related to each other should show different scores

42
Q

Feasibility

A

An assessment of the practicality of a proposed project/plan/scale

43
Q
A