Evidence Based Practice

Question 0

Construct validity

Answer 0

Is Meaning attached to concepts used in study correct. Accurately labelled variables

Question 1

Internal validity

Answer 1

Did treatment cause effect

Question 2

External validity

Answer 2

Person, setting, or times to which results can be generalized

Question 3

Threats to internal validity (10)

Answer 3

History-events outside of study
Maturation
Testing-familiarity with test may affect results
Instrumentation - changes in measurement tools
Regression to mean - if eval measure variable, people will move toward mean, need reliable measure
Assignment to groups- best if randomized
Mortality- subjects lost
Diffusion - limit interaction between participants
Compensatory equalization - researcher biased about treatments
Compensatory rivalry - one group thinks getting less desire able treatment

Question 4

nominal measure

Answer 4

male/female, yes/no, classification without value

Question 5

concurrent validity

Answer 5

measure what you think you’re measuring as compared to Gold standard

Question 6

ordinal number

Answer 6

MMT, A level, no equal intervals between values

Question 7

interval scale

Answer 7

temperature, distance between numbers is equal. zero is arbitrary

Question 8

ratio scale

Answer 8

weight, length. equal distance between numbers. zero is absolute

Question 9

simple random sampling

Answer 9

each member population equal chance of selection. random table numbers.

Question 10

systematic sampling

Answer 10

select every nth person on list.

Question 11

stratified sampling

Answer 11

subject randomly selected from pre determined subgroups. proportional or non proportional.

Question 12

cluster sampling

Answer 12

random sample of naturally occurring groups. cost effective and easier/efficient.

Question 13

purposive sampling

Answer 13

pick specific subjects to assure variety wanted.

Question 14

correlation coefficient

Answer 14

relationship between two things.

Question 15

criterion validity

Answer 15

predictive and concurrent. extent to which measure related to another measure

Question 16

multiple regression

Answer 16

extension of correlation and regression for multitude of variables to predict dependent variables.

Question 17

odds ratio

Answer 17

estimate relative risk by calculating ratio of the odds that each of two groups will possess characteristic

Question 18

risk ratio

Answer 18

ratio of incidence rate for one subgroup and incidence rate for another subgroup.

Question 19

z score

Answer 19

deviation score divided by the standard deviation. indicates how many standard deviations the raw score is above or below the mean