errors, state, trait and why ?

Question 1

where does errors can come from?

Answer 1

participants, researcher and the measurement itself.

Question 2

what are traits and its characteristics

Answer 2

E.g., extraversion, IQ, depression, anxiety
• Resistant to change over time
• Refer to behaviour in general
• Often easier to measure with questionnaires

Question 3

what are states and its characteristics.

Answer 3

E.g., sleepiness, hunger, depression, anxiety
• Subject to change over short time periods
• Refer to behaviour in the moment (i.e., now)
• Easy to measure with tasks and questionnaires

Question 4

questionnaires are good. Why?

Answer 4

because they make good dependent variables.

they also help eliminate covariates, controls or experimental groups.

Question 5

how to develop good standard scores

Answer 5

get a big sample.

data needs to represent full range of scores.

break scores in to psychologically meaningful groups