What is the evidence based practice process?
- ask a question
- access the evidence
- appraise the evidence
- apply the evidence
- assess the process
what are the 3 levels of research Q’s?
- Decisional
- Relational
- Casual
What are the characteristics of a RCT?
Randomization
Manipulation
Control
What are examples of threats to internal validity
history maturation testing instrumentation experimental mortality statistical regression selection bias selection-maturation interaction
What are the different types of quantitative studies?
True experimental
Quasi-experimental
Pre-Experimental
Non-experimental
Characteristics of True experimental
- need RANDOMIZATION, CONTROL, MANIPULATION
- intervention w/held from control group
- it controls the influence of basic threats to internal validity and eliminates unwanted phenomena
- answers level 3 q’s
- sufficient theory to examine causality
- conditions/ethics that permit R.C.M
Characteristics of quasi-experimental
- may not be appropriate or ethical to use randomization or to manipulate the w/holding of an intervention
- choice of this study should be based on level of Q and constraints of research
- participants may be from an already formed group ex) exercise class
- matched groups (age, gender, etc)
- CONTROL AND MANIPULATION
Characteristics of pre-experimental
-describes phenomena/relationships, potential bias, –inadequate control
- level 1 Q’s
- descriptive
- doesnt have randomization
- may not have control
collects preliminary info
What do factorial designs do?
evaluate the effect of 2 or more independent variables and the effect of the interventions on different factors/levels
Characteristics of non-experimental
- useful in testing a concept that naturally occurs
- survey research - level 1
- correlational research - level 2
Single blind
participants do not know what group they’re in
Double blind
research and partcipants do not know what group theyre in
Blind Assessment
person doing the ax. does not no what group they’re in
How could bias caused by lack of blinding affect outcomes?
Could increase or decrease effect
How can blinding reduce bias?
- may help equalize attention/group
- may help avoid differential attrition
- may help avoid expectation of between/worse outcomes
