re-analysis of the Commission on Community Interrelations experiments
6 publications · 1,130 checks on the transcription · 47 data tables · 3 attitude experiments, 1946 · 7 preference rounds, 1945–1946 · 1 replication, 1949
Companion to CODEBOOK.md (the 1946 anti-Semitic waiting-room experiments).
Levi & Goldberg, transcribed 2026-10-13 from the page images of
Every row carries source and page. Pages are journal pages (3 to 17); PDF page 1 is a publisher
cover, so journal page p is PDF page p - 1. Every number was read from a page image (130 dpi for
text, 300 dpi for every table). Values keep the printed form, including the leading + on change
scores. The article prints no respondent-level data and no within-cell standard deviations.
Check before use: python3 scripts/verify_hck1953.py recomputes 159 printed totals, ANOVA
lines, probabilities, chi-squares and cross-table identities. All pass. Five printed numbers do not
reproduce from the cells; they are listed in the script's KNOWN dict and below.
The Commission on Community Interrelations of the American Jewish Congress ran the study on five days, 2 to 6 May 1949, between noon and 2 P.M., at the New York Academy of Chess & Checkers near Times Square. Passers-by were recruited with the 1946 offer of half a dollar for half an hour. The play is set on a crowded subway. A Negro bumps a white man, Bill Jones, who says "These niggers take every chance they get to shove. They're all alike." A third man, Ed Stevenson, answers him with the American tradition argument or the individual differences argument. Every answer is calm (the authors' "low emotion"), and every answer opens with "The train is crowded, and people can't help pushing." In half the presentations a white actor plays Stevenson; in the other half a Negro actor plays him, and the script has him speak as a Negro. Each presentation contains both arguments by the same answerer: version 1 with one argument, a product-identification game, then the incident replayed from Jones's first speech with the other argument. The face sheet at the end asks which of the two methods of answering Jones was best.
The design adds control groups. On 2, 4 and 6 May (12 "pre-and-post-test" groups) the audiences filled out the citizenship scale before the play, after Jones's first speech, after the first argument and at the end, and the about Negroes scale after Jones's first speech in each version. On 3 and 5 May (8 "post-test-only" groups) the first two citizenship administrations and the first about Negroes administration were dropped. The four presentations ran in reverse order on 4 and 5 May. Some 2 May questionnaires were mislabeled and unusable, and 6 May was added to replace them. Replies of Negro subjects were dropped. The 20 groups held 25 to 30 people each, and the summary reports 564 white subjects.
Both scales score high = more anti-Negro. The citizenship score is the number of the statement checked (1 = "best citizens", 9 = "worst citizens"). The about Negroes score is 10 minus the number checked (statement 1, "Jones is ABSOLUTELY RIGHT", scores 9). A change score is the first administration after an argument minus the last one before it, so negative = less prejudice, as in Citron's files (p. 9).
| File | Rows | One row per | Contents |
|---|---|---|---|
hck1953_cells.csv |
36 | printed cell | Table 1 levels, Tables 2 to 4 changes, Table 8 preference percentages, with n |
hck1953_margins.csv |
15 | printed total | row, column and grand totals of Tables 2 to 4, for verification |
hck1953_anova.csv |
25 | ANOVA line | Tables 5 and 6: mean square ("variance"), df, printed star |
hck1953_tests.csv |
11 | reported test | Table 7 t values, probabilities in the text, both chi-squares |
hck1953_design.csv |
33 | design item | dates, place, recruitment, sample, program, measures, exclusions |
hck1953_groups.csv |
20 | audience group | date, pre-post or post-only, answerer, answer order (reconstructed from pp. 6-7) |
hck1953_answers.csv |
5 | answer x answerer | content, manner, opening line, the 1946 counterpart |
hck1953_settings.csv |
3 | setting | white answerer, Negro answerer, both |
hck1953_outcomes.csv |
6 | outcome | each measure, what lies between its two administrations, the 1946 counterpart |
hck1953_text_numbers.csv |
44 | number in the text | page, value, short quote |
hck1953_instruments.csv |
29 | scale item | wording and scoring of both scales (appendices B and C) and the preference question |
hck1953_scripts.csv |
31 | script line | introduction and the four answer scripts (appendix A, pp. 14-16) |
experiment: hck1953 on every row.
answer: low_american (calm American tradition), low_individual (calm individual
differences), both for margins. The ids follow Citron's because the manner matches his "low
emotion" condition. The wording is a new anti-Negro script, so the ids name the argument type and
manner. They do not mean the same text was spoken.
setting: ts1949_white (white actor), ts1949_negro (Negro actor), ts1949_all (margin).
group_type: pre_post (12 groups), post_only (8 groups), all (20 groups).
answer_position: first or second answer heard. Tables 1 to 3 classify by the first answer,
Table 4 by the second.
outcome:
| outcome | measure | between the two administrations | 1946 counterpart |
|---|---|---|---|
citizenship_answer1 |
citizenship, 2nd to 3rd | the first argument only | citizenship_answer1 (Exp III), same position |
about_negroes_change |
about Negroes, 1st to 2nd | first argument; game; Jones repeats his speech | jones_right (Exp III, 5 points), same position, 9 points here |
citizenship_answer2 |
citizenship, 3rd to 4th (1st to 2nd in post-only groups) | game; Jones repeats; about Negroes scale; second argument | citizenship_answer2 (Exp III), same position |
citizenship_level_v1 |
citizenship level after version 1 | (level, Table 1) | none |
about_negroes_level_v2 |
about Negroes level after Jones's second-version speech | (level, Table 1) | none |
preference_best |
percent naming each answer best | end of session | the preference question of Selltiz et al. 1950 |
low_american and low_individual.
No high-emotion answer was staged. The scripts are new and add a "logic of the situation" line.
Content and manner are therefore not crossed here, and Citron's manner-by-content interaction
cannot be estimated.hck1953_groups.csv is reconstructed from the program
description (pp. 6-7). The ANOVA df agree with it (12 pre-post groups, 8 post-only, 20 in all).| Printed | Recomputed | Where |
|---|---|---|
| p = .09 | .079 | Fisher combined p for the about Negroes scale (p. 11) |
| p = .13 | .121 | t = 1.56 on 146 df (p. 12) |
| p = .012 | .0114 | t = 2.55 on 253 df (p. 12) |
| chi-square 12.2 | 11.99 (Yates), 13.30 (uncorrected) | Negro-answerer columns of Table 8 (p. 13) |
| 3.50 - .01 = 3.49 | 3.514 | citizenship level from p. 12 against Table 1; bases differ (316 against 313), so this one may not be an error |
The first three gaps are small and probably reflect lookup from printed tables. None changes a conclusion the authors drew.