Biological practical

• Aim - investigate relationship between digit ratio and physical aggression scores
• Alternative hypothesis - Negative correlation between digit ratio of people and their physical aggression score
• Procedure = informed consent was gained from participants

  Participants given QR code - buss pery aggression

  Asked to answer honestly, given 10 minutes

  Participants instructed to measure their length of ring and index finger to find digit ratio
• Opportunity sampling 12 students 2 male 10 female
• Improvement one - increase number of participants

  limit sample size used

  may not be a representative

  increased population validity
• Improvement two - different different ways of measuring testosterone

  Blood test to measure

  Large marginal errors when testing finger length due to vision + low perception
• Strength of practical

  • Study with correlational - investigate relationship between aggression and a factor we cannot ethically not practically investigate otherwise - relationship between testosterone and aggression
  • Counterpoint - factors such as trauma upbringing social groups can impact physical aggression score - cannot establish true cause and affect relationship
• Weakness of practical

  • Low population validity - used 2 males 12 females from a British school - unable to generalise to the rest of population