practical

• aim


  to investigate whether amount of sleep impacted aggression levels(self-reported)
• sample

  • psychology students 16-17
  • opportunity sample
  • 14ppts (11f,3m)
  • north west college, UK
• Procedure


  brief

  • should take 10 minutes
  • have right to withdraw at anytime
  • do i have your consent to take part

  1. how many hrs of sleep did you get last night?
  2. on scale of 1 - 10, (1=never, 10=always) how often do you act aggressively towards others?
  3. on scale of 1 - 10, (1=never, 10=always) how often have u felt aggressive over past month ( score out of 20 in total )

  debrief , thanks for participating, all names kept confidential
• results

  • -0.39 calculated value is lower than -0.538 so results arnt significant , so we 95% confident results due to chance so we accept null as no sig relationship

  -0.39 = moderate negative correlation so sleep increases, aggression decreases so in future we predict aggression will occur when people lack sleep
• null & 2tailed hypothesis

  • null = no significant relationship between hrs of sleep and self-reported aggression, any relationship down to chance
  • 2 tailed = there will be a significant relationship between sleep and aggression
• 1 improvement

  • improve sample of 16-17 yr old psych students
  • collect older ppts using volunteer sample with advert to collect 18+
  • making results more generalisable as represents different ages in society
• eval points

  • sample restricted
  • correlational method so may be impacted by extraneous variables
  • self report (socially desirable answers)
  • standardised procedure same 3 questions
  • useful as rest make people less aggressive