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Flashcards in Quantitative data collection Deck (16)
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1
Q

What is interrater reliability?

A

consistency of observations reflected as a coefficient kappa (Cohens kappa)

2
Q

What does COHEN’S KAPPA refer to?

A

interrater reliability in data collection

3
Q

What is intervention fidelity?

A

consistency in data collection

4
Q

What 2 things affect data consistency in quantitative data collection?

A

Intervention fidelity

interrater reliability

5
Q

What does RELIABILITY of the measurement tool refer to?

A

the CONSISTENCY with which the instrument measures the concept of interest.

6
Q

What are the 3 aspects of reliability ?

A
  • Stability (test retest reliability)
  • homogeneity (chronbachs alpha of 0.8 or bettter)
  • interrater reliability
7
Q

What is validity?

A

The extent to which an instrument actually measures or reflects the abstract construct

8
Q

Why use control in a quantitative design?

A

to hold the conditions of the study uniform and impact of extraneous variables on the dependent variable

9
Q

What are the necessary steps to controlling the treatment in an experiment?

A
  1. make detailed description of the treatment

2. use strategies to ensure consistency of implementation (same nurse, same equipment, same time)

10
Q

What are the 4 ways to control extraneous variables?

A
  1. homogenous sampling
  2. data consistency
  3. Random selection/assignment
  4. Manipulation of independent variable
11
Q

What is internal validity?

A

the extent to which the study findings are TRUE rather than the result of extraneous variables
*Factors within the study design

12
Q

What is external validity?

A

the extent to which study findings can be generalized beyond the sample used in the study

13
Q

6 factors that affect internal validity?

A
  1. maturation
  2. history
  3. Mortality
  4. Instrumentation
  5. testing
  6. selection bias
14
Q

What are the 3 threats to external validity?

A
  1. selection effects (present in a NON random sample)
  2. reactive effects
  3. Measurement effects
15
Q

What is the rosenthal effect?

A

self-fulfilling prophesy– behaviours of the participants change based on expectations and perceptions

16
Q

What is the halo effect?

A

tendency of judges to overrate a performance because the participant has a good reputation