Week 10 quiz Flashcards
importance of study appraisal
critical appraisal involves judging whether evidence is free of bias and evaluating the strengths / limitations
**important for pt safety and efficiency
PRISMA checklist
preferred reporting items for systematic reviews and meta-analysis checklist
PRISMA
includes points concerned with every aspect of systematic reviews and guidelines for the IMRAD
IMRAD
introduction
methods
results
discussion
study validity
measure of truth / accuracy of a claim
-ability to accept results as logical, reasonable, justifiable
internal validity
the IV is responsible for the observed change in the DV
internal validity threats
selection bias
history effect
maturation
mortality / subject attrition
testing effect
instrumentation
selection bias
occurs with preexisting differences between groups
history effect
effects of unexpected events that take place concurrently with the IV
maturation
changes occurring within a participant as a result of passage of time not the IV
mortality / subject attrition
loss of participants before study is complete
testing effect
experience with measurement instrument - pretest
instrumentation
inaccurate data collection / changes in methods of measurement or collector
construct validity
threat to validity when instruments used do not accurately measure concepts
construct validity threats
bias
confounding
reactivity
experimenter expectancies
reactivity
participants change behavior or performance in response to being observed
statistical conclusion validity
are the results of the statistical analysis accurate and reflect the relationship b/t IV and DV
statistical conclusion threats
low statistical power
low reliability of measures
low reliability of treatment implementation
external validity
do results of study apply to broader subjects / settings / times
external validity threats
selection effects
interactions
selection effects
sample does not represent population
study with internal validity….
the intervention is the source of the DV change
study with construct validity…
selection / measurement measures concept accurately
study has external validity….
if results can be generalized
reliability
consistency of research study or measuring test
appraising evidence
- PICO
- search relevant evidence
- gather multiple types of evidence
- appraise evidence
**possible bias, methods, limits, strengths, LOE
