PSYCH SOC Flashcards
(515 cards)
Conclusion based on a sample is?
Statistic
Conclusion based on a population is?
Parameter
3 Types of Probability Sampling?
Simple
Cluster
Stratified
Nonprobability Sampling
Snowball
Cluster Sampling
Selecting clusters (townships) of participants randomly.
-Clusters should be similar to each other other than the intervention you’re applying
-Ex. 6 townships of Ontario, 3 get fluoride, and three done
Stratified Sampling
Sort the population into subpopulations, then randomly sample proportionality from those subpopulations.
-You SUSPECT that the subpopulations might be different in the variable of interest.
-EX: You suspect ON and QU will vote differently in an upcoming federal election. You survey twoce as many ON than QU
Snowball Sampling
Initial participants are found, then they refer researchers to other participants
-FInding more
Block Design
Groups first, then randomize
-Group first, such as by gender, then randomize new groups with equal number from each group.
Match Pair Design
Double Block
Case Control Studies are for
Rare Outcomes
Study 2 groups, one that has a certain outcome and one that doesn’t. Then the values of another variable are compared between groups
PAST
What type of study removes bi-directionality?
Quasi-Experimental Studies
-Inventions applied but not randomly
-Longitudinal
Case Studies
Dive Deeply into a Few Cases
-Studies a particular criminal’s motivations, situations, not a model
-No STATS
Best way to do research is?
MIXED METHODS combines multiple methods to paint a better picture.
-Gets rid of the weakness of one.
Discrete Data
Numerical data restriction to specific values (whole numbers integers)
Continuous Data
Data not restricted to certain number values (Non-integers, decimals)
The area under a normal distribution is equal to what?
1
Bell curve and symmetrical
Mean is the center of distribution
Uniform Distribution
Probability is the same
For interval or ratio data that are skewed or contain outliers, use what measurement for central tendency?
Median
For interval or ratio data that are non-skewed, use what measurement for central tendency?
Mean
Interval Variables
Has an arbitrary zero point, intervals between values on a scale
ONLY addition or subtraction
Ratio Variables
Has a meaningful Zero
-Can do all math
Outliers greatly effect _____ and ______
Mean and Standard Deviation
Standard Error
Standard error is the standard deviation
Random Error
High Accuracy
Low Precision
-Occurs in all types of measurements by instrument insensitivity and human error