SPSS Compatibility Status

Summary

• Functions in SPSS-validation scope: 53
• With validation tests in place: 42
• Validation gaps (no test file yet): 11
• Active Tier-3 algorithmic exceptions: 0

Tier Definitions

Every numerical comparison between an R-side value and an SPSS reference falls into one of four tiers (Charter §4):

• Spec — exact integers and SPSS-truncated sentinels (exact match)
• Display — SPSS rounds for print; tolerance is half a unit of the last printed decimal
• Exception — documented algorithmic difference; see VALIDATION_EXCEPTIONS.md
• Internal — statistic has no SPSS equivalent; verified via snapshot tests only

Per-Function Status

The columns show how many assert_spss() calls per tier the validation file contains. “Total” is the total number of charter-compliant assertions.

The “Internal (Tier 4)” column flags statistics that have no SPSS reference and are therefore R-only: for the rank-based family the weighted variant (SPSS NPAR TESTS and NONPAR CORR ignore WEIGHT BY); for reliability, McDonald’s omega in all paths (IBM does not publicly document the SPSS omega algorithm; an SPSS v29 reference run is pending). Tier-4 statistics are covered by internal regression and cross-check tests plus a weights-equal-1 invariance suite instead of SPSS references. (mann_whitney’s weighted variant is a design-based rank test additionally validated against survey::svyranktest().) All other statistics of these functions are SPSS-validated as shown in the tier columns.

Function	Status	Spec	Display	Exception	Total	Internal (Tier 4)
ancova	compliant	1	5	0	6	—
binomial_test	compliant	2	3	0	5	weighted variant
center	not validated	—	—	—	—	—
chi_square	compliant	2	6	0	8	—
chisq_gof	compliant	2	2	0	4	—
codebook	not validated	—	—	—	—	—
cramers_v	not validated	—	—	—	—	—
crosstab	compliant	4	5	0	9	adjusted standardized residuals (Haberman-formula oracle; SPSS /CELLS=ASRESID reference run pending)
describe	compliant	2	3	0	5	—
dunn_test	compliant	0	1	0	1	weighted variant
efa	compliant	1	7	0	8	—
factorial_anova	compliant	1	5	0	6	—
fisher_test	compliant	1	3	0	4	—
frequency	compliant	2	5	0	7	—
friedman_test	compliant	3	3	0	6	weighted variant
goodman_gamma	not validated	—	—	—	—	—
kendall_tau	compliant	4	6	0	10	weighted variant
kruskal_wallis	compliant	5	3	0	8	weighted variant
levene_test	compliant	0	2	0	2	—
linear_regression	compliant	4	23	0	27	—
logistic_regression	compliant	7	13	0	20	all statistics (textbook-formula oracle; no SPSS v29 reference run yet)
mann_whitney	compliant	2	8	0	10	weighted variant
mcnemar_test	compliant	3	1	0	4	—
multiple_response	compliant	11	10	0	21	all statistics (hand-computation oracle; SPSS MULT RESPONSE reference run pending)
normality_test	compliant	4	8	0	12	all statistics (independent-implementation oracles; SPSS EXAMINE reference run pending)
oneway_anova	compliant	6	16	0	22	—
pairwise_wilcoxon	compliant	0	1	0	1	weighted variant
partial_cor	compliant	3	9	0	12	all statistics (residual-regression oracle; SPSS PARTIAL CORR reference run pending)
pearson_cor	compliant	2	5	0	7	—
phi	not validated	—	—	—	—	—
pomps	not validated	—	—	—	—	—
rec	not validated	—	—	—	—	—
reliability	compliant	1	5	0	6	McDonald’s omega (all paths)
row_count	not validated	—	—	—	—	—
row_means	not validated	—	—	—	—	—
row_sums	not validated	—	—	—	—	—
scheffe_test	compliant	0	2	0	2	—
spearman_rho	compliant	2	2	0	4	—
std	not validated	—	—	—	—	—
t_test	compliant	2	30	0	32	—
tukey_test	compliant	0	4	0	4	—
w_iqr	compliant	0	19	0	19	—
w_kurtosis	compliant	0	19	0	19	—
w_mean	compliant	0	19	0	19	—
w_median	compliant	0	19	0	19	—
w_modus	compliant	0	19	0	19	—
w_quantile	compliant	0	19	0	19	—
w_range	compliant	0	19	0	19	—
w_sd	compliant	0	19	0	19	—
w_se	compliant	0	19	0	19	—
w_skew	compliant	0	19	0	19	—
w_var	compliant	0	19	0	19	—
wilcoxon_test	compliant	6	6	0	12	weighted variant

Active Exceptions

No active Tier-3 exceptions. All validated statistics agree with SPSS within Spec or Display tolerances.

Validation Gaps

The following functions are in SPSS-validation scope (per Charter §9) but do not yet have a test-<fn>-spss-validation.R file:

• center
• codebook
• cramers_v
• goodman_gamma
• phi
• pomps
• rec
• row_count
• row_means
• row_sums
• std

How to Read “SPSS-Compatible”

A function is SPSS-compatible when:

1. It has a validation test file (column “Status: compliant”)
2. Its Legacy column is zero
3. Every value it asserts falls into Spec, Display, or a registered Exception
4. It carries no NA placeholders in its spss_values block

Functions with non-zero Legacy counts are mid-migration and not yet Charter-compliant; their assertions may pass but do not yet enforce the documented tolerance policy.

Methodology

All validation runs SPSS v29 syntax scripts in tests/spss_reference/syntax/ against tests/spss_reference/data/, saves the output to tests/spss_reference/outputs/, and asserts the R-side computation matches via assert_spss() from the validation helpers in tests/testthat/. Inline cached values in test files cite their source line via trailing # <output_file>:<line> comments; the dev-only script tests/spss_reference/verify_inline.R audits this citation chain before every release.