Dimensionality and Reliability of a Modified Version of Norton's 1983 Quality Marriage Index among Expectant and New Canadian Mothers

Abstract

A slightly modified version of Norton's 1983 Quality Marriage Index was administered to 61 expectant mothers prior to giving birth and within 3 mo. after giving birth. Mothers' ages ranged from 19 to 43 years (M = 30, SD = 5.01) and their partners' ages ranged from 21 to 48 years (M = 32, SD = 6.02). Mothers were presented an opportunity to participate in this study during prenatal classes held at hospital and community health centers. The only requirement for participation was that the mother be residing with her child's father for the duration of the study. The six items of the modified index showed high internal consistency (α>.90) and substantial test-retest reliability with a Pearson zero-order correlation of .65 across the two administrations. Maximum likelihood factor analysis indicated moderate support for unidimensional factor structure for the modified index, but removing one item from the pre- and postnatal administration improved the factor structure. In the first administration, the last item (overall current satisfaction with partner) fit poorly with the factor structure, while at the second administration, the second item (our relationship is very stable) fit poorly. Possible implications of the results are discussed.

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References

Belsky

(1985) Exploring individual differences in marital change across the transition to parenthood: the role of violated expectations. Journal of Marriage and the Family, 47, 1037–1044.

Belsky

Hsieh

K. H.

(1998) Patterns of marital change during the early childhood years: parent personality, coparenting, and division-of-labor correlates. Journal of Family Psychology, 12, 511–528.

Belsky

Rovine

(1990) Patterns of marital change across the transition to parenthood: pregnancy to three years postpartum. Journal of Marriage and the Family, 52, 5–20.

Belsky

Spanier

G. B.

Rovine

(1983) Stability and change in marriage across the transition to parenthood. Journal of Marriage and the Family, 45, 553–566.

Bosch

K. R.

Schumm

W. R.

(2008) Dimensionality of subscales for emotional support in the Bosch Support Measure for Survivors of Domestic Abuse. Psychological Reports, 103, 657–664.

Bradbury

T. N.

(1995) Assessing the four fundamental domains of marriage. Family Relations, 44, 459–468.

Calahan

C. A.

(1997) Internal consistency, reliability, and concurrent validity of the Kansas Marital Satisfaction Scale and the Quality Marriage Index. Psychological Reports, 80, 49–50.

Comfrey

A. L.

Lee

H. B.

(1992) A first course in factor analysis. Hillsdale, NJ: Erlbaum.

Cowan

C. P.

Cowan

P. A.

(2000) When partners become parents: the big life change for couples. New York: Basic Books.

10.

Cronbach

L. J.

Jr. (1951) Coefficient alpha and the internal structure of tests. Psychometrika, 16, 297–334.

11.

Feeney

J. A.

Noller

Hanrahan

(1994) Assessing adult attachment. In Sperling

M. B.

Berman

W. H.

(Eds.), Attachment in adults: clinical and developmental perspectives. New York: Guilford. Pp. 128–152.

12.

Fincham

F. D.

Bradbury

T. N.

(1987) The assessment of marital quality: a reevaluation. Journal of Marriage and the Family, 49, 797–809.

13.

Gorsuch

R. L.

(1983) Factor analysis. (2nd ed.) Hillsdale, NJ: Erlbaum.

14.

Hatcher

(1994) A step-by-step approach to using the SAS® system for factor analysis and structural equation modeling. Cary, NC: SAS Institute.

15.

Haynes

S. N.

Richard

D. S.

Kubany

E. S.

(1995) Content validity in psychological assessment: a functional approach to concepts and methods. Psychological Assessment, 7, 238–247.

16.

Heyman

R. E.

Sayers

S. L.

Bellack

A. S.

(1994) Global marital satisfaction versus marital adjustment: an empirical comparison of three measures. Journal of Family Psychology, 8, 432–446.

17.

Johnson

M. D.

Bradbury

T. N.

(1999) Marital satisfaction and topographical assessment of marital interaction: a longitudinal analysis of newlywed couples. Personal Relationships, 6, 19–40.

18.

Landau

Everitt

B. S.

(2004) A handbook of statistical analyses using SPSS. Boca Raton, FL: Chapman & Hall/CRC.

19.

Levy-Shiff

(1994) Individual and contextual correlates of marital change across the transition to parenthood. Developmental Psychology, 30, 591–601.

20.

MacCallum

R. C.

Widaman

K. F.

Zhang

Hong

(1999) Sample size in factor analysis. Psychological Methods, 4, 272–299.

21.

Meredith

Noller

(2003) Attachment and infant difficultness in postnatal depression. Journal of Family Issues, 24, 668–686.

22.

Norton

(1983) Measuring marital quality: a critical look at the dependent variable. Journal of Marriage and the Family, 45, 141–151.

23.

Norusis

M. J.

(1993) SPSS for Windows: professional statistics release 6.0. Chicago, IL: SPSS, Inc. [Computer software].

24.

Nunnally

J. C.

(1978) Psychometric theory. (2nd ed.) New York: McGraw-Hill.

25.

Osborne

J. W.

Costello

A. B.

(2004) Sample size and subject to item ratio in principal components analysis. Practical Assessment, Research & Evaluation, 9(11). (http://pareon-line.net/getvn.asp?v=9&n=11, Nov. 8, 2006.).

26.

Pancer

S. M.

Pratt

Hunsberger

Gallant

(2000) Integrative complexity and the transition to parenthood. Journal of Personality, 68, 253–280.

27.

Schumacker

R. E.

Lomax

R. G.

(2004) A beginner's guide to structural equation modeling. (2nd ed.) Hillsdale, NJ: Erlbaum.

28.

Shapiro

Gottman

Carrere

(2000) The baby and the marriage: identifying factors that buffer against decline in marital satisfaction after the first baby arrives. Journal of Family Psychology, 14, 59–70.

29.

Spanier

G. B.

(1976) Measuring dyadic adjustment: new scales for assessing the quality of marriage and similar dyads. Journal of Marriage and the Family, 38, 15–28.

30.

Zelkowitz

Tamara

M. H.

(1996) Postpartum psychiatric disorders: their relationship to psychological adjustment and marital satisfaction in the spouses. Journal of Abnormal Psychology, 105, 281–285.