L5 Notes on Data Analysis

Question 1

Likert scale

Answer 1

is ordinal

Question 2

Why do we use reverse scoring?

Answer 2

• To keep respondents alert

Question 3

Drawbacks reverse scoring?

Answer 3

Miscomprehension

Question 4

What has to be done with reverse scoring prior to the analysis

Answer 4

The scores have to reverted so a 5 on a 1-6 scale become a 2

Question 5

Calculate Reliability

Answer 5

cronbach’s alpha
- most used “consistency index”
- increases in number of items
- increases in correlation between items
–> rule of thumb: higher than .7 = internally reliable (ideally above .8)
0 means items are not related
1 only occurs when you use the same item again and again

Question 6

Attention checks

Answer 6

• measure of attention to survey
• if not pass, exclude from the analysis
  problem: could create a bias because certain participants may be excluded (younger children)

Question 7

How low should the p-value be?

Answer 7

• p<= .05 the difference is statistically significant

- p<= .1 the difference is marginally significantly different