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Flashcards in chapter 5 Deck (25):
1

validity

measurement has____ when it yields data that are directly relevant to the phenomenon measured and the reason for measureing

2

accuracy

to the extent to which the observed value matches the true state

3

observed value

the quantitative label produced by measuring an event

4

true value

a measure obtained by procedures that are independent of and different from the procedures that produced the data. Taken all possible efforts to make sure errors are avoided or removed.

5

measurement bias

nonrandom measurement error
-error in measurement that is likely to be in one direction

6

reliablility

measurement procedure yields the same value when brought into repeated contact then the same state of nature

7

direct measurement

occurs when the phenomenon that is the focus of the experiment in the same as the phenomenon being measured

8

indirect measurement

occurs when what is actually measured is in some way different from the target BX of interest

9

continuous measurement

measurement conducted in a manner such that all instances of the response class of interest are detected during an observation

10

discontinous measurement

any form of measurement in which some instances of the response class of interest may not be detected

11

observer drift

observes alter, unknowingly the way they apply a measurement system

12

naive observer

a trained observer who is unaware of the study's purpose and/or the experimental conditions in effect during or given phase or observation period

13

observer reactivity

measurement error resulting from an observers awareness that others are evaluating the data he reports.

14

calibration

when measurement error is consistent in direction and value, the data can be adjusted to compensate for the error

15

interobserver agreement (IOA)

refers to the degree to which 2 or more independent observers report the same observed values after measuring the same events.

16

believability

consumers judge that the data is trustworthy and deserving of interpretation

17

total count IOA

expressed by percentage of agreement between the total number of responses recorded by 2 observers and is calculated by dividing the smaller of the counts by the larger count and multiply by 100.

18

mean count- per- interval IOA

look up formula

19

exact count per interval

the percentage of total intervals in which 2 observers recorded the same count
look up formula

20

trial by trial IOA

more conservative and meaningful
number of trials (items) agreement
______________________
total number of trials (itmes)= X 100

21

total duration IOA

computed by dividing the shorter of the 2 durations reported by the observers by the longer duration + ,multiply by 100
shorter
_______
longer durations x 100=

22

mean duration per occurrence IOA

conservative and usually more meaningful assessment of IOA
look up formula

23

interval by interval IOA

primary observer's record for each interval is matched to the secondary observers record for the same interval
number of interval agreed
______________________
# of intervals agree =# of intervals disagreed x 100

24

scored interval IOA

only intervals in which either or both observers recorded the occurrence of the target behavior are used when calculating

25

unscored interval IOA

only interval in which either or both observers recorded the non-occurrence of the target BX are considered