1. There were 4 teams of 4 researchers: 2 female observers, 2 males – one acting as victim, one the model.
2. The victims (3 white, 1 black) were all male, General Studies students, aged 26-35 years, and dressed alike. They either smelled of liquor and carried a liquor bottle wrapped tightly in a brown bag or appeared sober and carried a black cane. In all aspects they acted identically in both conditions.
3. The models (all white) were males aged 24-29 years. There were 4 model conditions: (i) Critical area - early, (ii) Critical area – late, (iii) Adjacent area – early, (iv) Adjacent area – late.
4. The observers recorded the dependent variables. On each trial one observer noted the race, sex and location of every rider seated or standing in the critical area. In addition she counted the total number of individuals who came to the victim's assistance. She also recorded the race, sex and location of every helper. The second observer coded the race, sex and location of all persons in the adjacent area. She also recorded the latency of the first helper's arrival after the victim had fallen and on appropriate trials, the latency of the first helper's arrival after the programmed model had arrived. Both observers recorded comments spontaneously made by nearby passengers and attempted to elicit comments from a rider sitting next to them.
5. The victim stood near a pole in the critical area. After about 70 seconds he staggered forward and collapsed. Until receiving help he remained supine on the floor looking at the ceiling. If he received no help by the time the train stopped the model helped him to his feet. At the stop the team disembarked and waited separately until other passengers had left the station. They then changed platforms to repeat the process in the opposite direction.
6. Between 6-8 trials were run on a given day, all using the same 'victim condition'.
7. There were more cane trials than drunk trials which were distributed unevenly across black and white victims because Team 2 violated intructions by running cane rather than drunk trials because the victim "didn't like" playing the drunk! Subsequent student strikes prevented additional trials to correct this.