The study by Schachter and Singer investigated two factors in emotion.

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2022). The mark or mark type is shown in brackets.

1. [1] The score on the Activity Index was higher for the Placebo / lower for the Epi Inf (1 mark)
2. [1] which meant the Placebo joined in more with the stooge or were more euphoric / Epi Inf joined in less or were less euphoric (1 mark).
3. [1] The average score was 12.72 (Epi Inf) and 16 (Placebo) (1 mark for either).
4. [1] There was a high level of standardisation, so replicability is high (1 mark).
5. [1] The stooges were given instructions on how to act so the study can be tested for reliability (1 mark).
6. [1] Quantitative data were collected so it was objective / easy to compare (1 mark).
7. [1] The activity index generated a score to show how euphoric a participant was so all (four) conditions could be directly compared (1 mark).
8. Other creditworthy strengths include: (internal) validity.