re-analysis of the Commission on Community Interrelations experiments

Answering an Antisemitic Remark, 1945 to 1949

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6 publications · 1,130 checks on the transcription · 47 data tables · 3 attitude experiments, 1946 · 7 preference rounds, 1945–1946 · 1 replication, 1949

Harding, Citron and King (1953): transcribed dataset

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 study

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.

Sign convention

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).

Files

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)

Keys

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

How the study maps onto the 1946 antisemitism experiments

Cautions

  1. Per-group data are not printed. 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).
  2. Bases differ across tables. Table 1 and Tables 2 to 3 have slightly different n for the same cell (90 against 89, 66 against 64), because a change score needs both administrations. The Table 4 margins by answer sum differently from Table 2 because Table 4 classifies by the second answer and includes all 20 groups.
  3. The ANOVA method is not stated. The verifier reproduces every effect mean square in Tables 5 and 6 (within rounding) with weighted main effects and an unweighted-means interaction. Other methods fail on Table 5's 3rd-to-4th interaction (.01), where the weighted residual is negative.
  4. Fisher's combined probabilities (.11, .09) pool the pre-post change and the post-only level for each scale. The verifier reproduces .11 from Tables 5 and 6 with within-groups error terms.
  5. Within-cell SDs are not printed. Table 7's t values allow an approximate SD for each answerer row (SD = |mean| x root n / t), which gives about .8 for both citizenship rows and about 1.3 to 1.5 for the about Negroes rows. The rounding of small means (.01) makes the 3rd-to-4th white SD unrecoverable.
  6. Sample percentages (p. 8) may include the Negro subjects who were later dropped; the text does not say. No table base reaches 564 (the largest, Table 8, sums to 541).

Known discrepancies in the printed article

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.

Main results (for orientation)