Stats

Question 1

Standard deviation is a measure of ________ within the ______ being assessed

Answer 1

variability
cohort

Question 2

2 standard deviations will capture about __% f the range of data

Answer 2

95

Question 3

Standard error represents the accuracy of the true ____.
It is used when we want to generalize our mean to other _____ _____ or the entire _______.
Standard error is dependent on _ _ and _____ size

Answer 3

mean
Similar cohorts
entire population
SD
Sample

Question 4

SD is dependent on the ____. This is shown from the C_______ of V________.
Smaller SD is (better/worse).

Answer 4

Mean
Coefficient of variation
Better

Question 5

Factors that influence variability (4)

Answer 5

• Biological
  *Physiological and Psychological fluctuations of an individual
• Technical
  *Precision and Accuracy of the instruments
• Testing
• Instructions and manner of administering the test
• Environmental
  *Temp and Humidity

Question 6

Reliability VS Validity

Answer 6

R - consistency of the outcomes of a repeated experiment
V - Extent to which the instruments being used are actually measuring what you want to measure

Question 7

2 of the most important thing to pay attention to in an experiment is…

Answer 7

Reliability (Precision, repeatability) and Validity (Accuracy, Correctness)

Question 8

Types of Validity

Answer 8

Content Related
- Face/logical
* Does the test appear to test what it aims to?
- Construct
* Does the test capture info related to the concepts
Criterion Related
- Concurrent
* Does the test give similar outcomes as other assessments
- Predictive
* Does the test allow you to predict an outcome of interest

Question 9

Downsides of Face Validity and example

Answer 9

Weakest form of validity
Difficult to quantify
No statistical verification
Needs to be established by an expert

Eg. Balance test