NR 420 Exam 2 Flashcards Preview

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Flashcards in NR 420 Exam 2 Deck (40):
1

Dependent variable

  • a variable (often denoted by y ) whose value depends on that of another.
  • Example: level of sleep disturbance, amt of narcotic

2

Independent Variable

  • Does not depent on the value of another
  • Example: Log, Actigrophy, sex of the patient

3

What is a literature review

Identifies the gap in the literature

4

What is Descriptive?

prevalence, magnitude or characteristics of the problem

5

Exploratory is

phenomena

6

Explanatory is

Correlation, the look at why

7

Predictive/Controlling

look at what will occur if rrelated factors change

8

What is a sample design

process of selecting a unit of a population for a study in a research investigation

9

What does a sample design do?

estimates or predicts a fact or outcome

10

What is a population

any one in the world who meet criteria for the people to be studied (Non small cell lung cancer patients)

11

What is a source population

a subset of the population, a smaller geographical area (medical center in northern Taiwan)

12

What is a sampling frame?

complete list of the units of the source of the population (target population).

13

What is eligibility criteria

  • characteristics that restrict the population to a homogenous group of subjects (subgroups)
  • Example: gender, age, socioeconomic status, education

14

3 Properties that make up true experimental design?

  1. randomization
  2. control
  3. manipulation

15

What is a research study using a true experimental design called?

RCT

16

Control group

  • homogenous sample
  • consistent data collection procedures
  • one or more constants
  • one receive manipulation, one doesnt (placebo)

17

Experimental group

some subjects receive the intervention. i.e. "manipulation"

18

Experimental Design

get different treatments, cause/effect relationship

19

Quasi Experimental

  • One variable has not been manipulated or controlled (because it cannot be)
  • cause/effect relationship, less powerful than 'experimental'

20

Non Experimental

  • Discover new meaning (RELATIONSHIP)
  • Describe what already exists
  • measure the r/t btwn 2+ variables
  • Outcome: hypothesis for future research, tentative explanations

21

Cross Sectional Data

collected at one point in time

22

Longitudinal study

collected at several point in time

23

Name 3 data collection methods

  1. Self Report (Interview, questionnaire)
  2. Observation
  3. Biophysiology

24

What 2 theses are measured in instruments

reliability and validity

25

What is reliability

  • repeated measurments would vive the same result.
  • Tool used to measure is consistent

26

What is Validity

  • Whether is measures what it's purpose is to measure
  • measurment is accurate

27

What are descriptive statistics?

summarize, measure of central tendency, variability, correlation

28

What are inferential statistics?

predict, generalize, answer research questions, used to draw a conclusion

29

In descriptive statistics, what can frequencies be converted to?

percentages

30

What does "measures of central tendency mean"

mean, median,, mode

31

In descriptive statistics, what is dispersion of spread?

range, variance, standard deviation

32

In descriptive statistics, what is measures of shape

distribution (symmetry) or Kurtosis (height)

33

Standard Deviation measures

how far from the mean (how far from normal)

34

Normal distribution

area under the curve

35

What 2 hypothesis are tested in inferential statistics?

research/scientific hypothesis, null hypothesis

36

In probability, what is the level of significance?

  • p value (.01 or .05). the lower the p value, the more significant the result
  • probabilyt of null hypothesis being true

37

Type I Error

  • the incorrect rejection of a true null hypothesis (a "false positive"
  • Reject null hypothesis
  • detecting an effect that is not present

38

Type II Error

  • failure to reject a false null hypothesis
  • failing to detect an effect that is present

39

Two Group Test is

T-Test

40

More than 2 groups test is

Analysis of Variance (ANOVA)