Test 1 Flashcards
(101 cards)
Define Validity
The strength of our conclusions, inferences, or propositions.
Internal Validity
Are there factors that could affect the outcome of the experiment?
- Concern is flaws within the study itself. Was it carried out as designed?
- Does the IV (and not some other variable) really cause the change in the DV?
External Validity
Refers to our ability to generalize the results of our study to other persons, settings, or times.
Define Variable
A variable is a measure representation of an abstract construct.
-It can differ in magnitude:
- A measurable characteristic that varies
- Age, intelligence, income
Define Independent Variable
The variable being manipulated.
Define Dependent Variable
The variable affected by the change in the independent variable.
Define Control Variables
Other factors that could affect the outcome of the experiment.
- These must be held constant to have a fair test.
Define Control Group
The control group is a selected group that does not receive the intervention or treatment.
Control Variable
Control Variables are factors that could affect the outcome of the experiment so they have to remain constant across all groups.
What is Regression toward the mean?
States that if a variable is extreme the first time you measure it, it will be closer to the average the next time you measure it.
- It can result in wrongly concluding that an effect is due to a treatment when it is due to chance.
- Pick the worst places, treat and then see the affect. Be careful with conclusins
Randomised Control Trials (RCT) - Strengths
Those eligible are randomly assigned into one of two groups.
- The intervention group.
- The control group.
- Remove potential Bias:
*Every subject is as likely as any other to be assigned to the treatment or control group. - Creates balance in the groups on factors in the study, whether those factors are measured or not.
- This allows accurate analysis of the effect of an intervention.
Define Effect Size
Quantifying the difference between the two groups.
Provides a measure of the “size of the effect” from the intervention.
The effect size indicates the magnitude of the observed effect or relationship is due to chance.
What is Statistical Significance?
Tells you how likely a pattern in your data is due to chance.
*Indicates the likelihood that an event is due to chance
* .05 findings has a five percent chance of not being true
Not the only thing:
*Helps you understand how rare the results are
* Does not tell you if the experiment was well conducted or well controlled
Define Paradigm
A paradigm is a model for observation and understanding that shapes both what we see and how we understand it.
Explain Rarity of discoer/ blind spots.
The rarity of discover/ blind spots:
-Can create blind spots
* A failure to see one’s basic assumptions about how things operate.
* The result discoveries are rare because expectations cloud our vision.
Observations about paradigms (Barker).
- Paradigms are common
- Paradigms are useful
- A warning: Sometimes paradigms become the paradigm
- The people who create new paradigms are often outsiders
- Advantages of young/ outsiders
- They don’t “know what can’t be done”
- They do not understand the subtilities of old rules
- They have no investment in old rules
- No peep pressure to keep the old model
- Paradigm pioneers must be courageous
- You can choose to change paradigms
What measuring things get you
Track progress of efforts - judge success
* If you can’t measure it, you can’t improve it
Aline activities with goal
Garner support and credibility
What is the Impact Domain?
How might intended police effects on the environment be measured?
What is the Process Domain?
How might police know if they are doing their works as they should?
What is the Community Assessment Domain?
How might public assessment of police performance be monitored?
What is Organization Health Domain?
How might police department know if their employees are satisfied with their work?
What is the Community Context Domain?
How might police organizations monitor changes in the work environment that impede or promote their ability to achieve organizational goals?
Bratton - Impact on crime with?
Better management
Higher expectations
Better startegies
Public confidence matters - Information (Kelling)
Acts that do not result in arrest or documentation often are not counted but may be very good for police departments and community.