Table 3. Means (and Standard Deviations) and Percentages of Discriminant Validity Variables as a Function of Cluster Membership.

	Cluster membership					Test
Outcome	Steady involvement(n = 112)	Later involvement(n = 145)	Sporadic involvement (n = 64)	Frequent involvement (n = 84)	Long-term committed (n = 106)	F(4, 506)	${\mathrm{\eta }}_{\mathrm{p}}^2$
	Clustering variables
No. of romantic partners	2.22 (0.42)a	.67 (0.47)b	2.11 (0.32)a	3.65 (0.67)c	1.00 (0.00)d	759.47**	.86
No. of waves in romantic relationships	6.55 (1.04)a	1.21 (1.10)b	3.16 (0.80)c	5.27 (1.06)d	6.31 (1.38)a	513.41**	.80
	Discriminant validity variables: Relationship variables
Average length (months)	33.83 (17.71)a	14.63 (20.23)b	13.88 (10.25)b	13.62 (6.14)b	78.94 (22.43)c	263.57**	.68
No. of waves with partner	3.87 (1.82)a	1.30 (0.69)b	1.38 (0.72)b	1.76 (1.05)b	6.00 (2.05)c	175.69**	.63
Wave 1st in relationship	14.36 (0.73)a	17.27 (2.45)b	15.54 (1.55)c	14.45 (0.85)a	15.21 (1.34)c	52.49**	.34
Age at 1st intercourse	17.31 (1.86)a	19.26 (2.89)b	17.58 (2.01)a	17.21 (1.68)a	18.17 (2.32)a	12.25**	.12
	Discriminant validity variables: Demographic variables (%)					χ2(4, N = 510)
Female	67.86a	35.17b	31.25b	55.95a	57.55a	39.64**
White	89.29	82.07	75.00	80.95	87.73	ns
High school graduates	93.75	95.17	85.94	90.48	93.40	ns
Lower socioeconomic status	27.68	33.79	25.00	30.95	32.71	ns
Married	40.95a	3.60b	8.51b,c	16.46c	66.67d	123.26**
Have children	39.64a	12.80b	25.86a,b	33.33a	64.08c	68.50**

Note. Means with different subscripts within a row are significantly different from one another (p ≤ .10) as tested with a Tukey's post hoc comparison.

^**p ≤ .01.