practical

Question 1

aim

Answer 1

investigate the relationship between average hours of sleep and aggression, measured using the Buss and Perry questionnaire

Question 2

alternate hypothesis

Answer 2

there will be a significant negative correlation between sleep in hours and mins and aggression score out of 145

Question 3

sample

Answer 3

• 20 ppts
• 6 male, 14 female
• king eds college
• 16-17 y o psych students
• opportunity sample

Question 4

procedure

Answer 4

• informed consent gained from ppts
• 3 consec nights, timer when going to sleep, wrote down in hrs and mins amount of sleep
• each morning at 10 am, filled out buss perry questionnaire 5 point scale, scores out of 145
• average for both calculated
• debrief

Question 5

controls

Answer 5

• 10 am so events during day did not affect score
• reverse questions
• stopwatch and questionnaire - standardised procedure

Question 6

results

Answer 6

• weak negative correlation
• observed value 0.21 for spearmans rho lower than critical 0.38 not significant

Question 7

generalisability

Answer 7

• only 16-17 year olds
• psych students

Question 8

reliability

Answer 8

• standardised procedures
• replicable

Question 9

validity

Answer 9

• doesn’t consider variables eg naps, not falling asleep until after timer