Definition
Social conflict refers to the various types of negative social
interaction that may occur within social relationships (e.g., arguments, criticism,
hostility, unwanted demands), and may include physical violence.
Measurement 
To date, social conflict has been a relatively neglected aspect of
social relationships in sociological and epidemiological research on social relationships
and health. Existing measures generally consist of a small number of items asking about
the frequency of various types of negative social interaction (i.e., demands, criticism);
items are generally asked with respect to specific types of relationships (e.g., spouse,
friends) (Seeman et al, 1994; Schuster et al, 1990). Data from the Mid-Mac, national
survey provide the only psychometric data on this type of measure, indicating reasonable
internal reliability, with coefficient alphas of .79-.81 for scales measuring social
conflict with family, friends and spouse (measures derived from Schuster et al, 1990).
Evidence of construct validity in terms of correlations with other measures is also seen
for Mid-Mac data (unpublished data).
Relationship to SES 
Available data suggest that lower SES is associated with higher
levels of social conflict for adults (Ryff, Seeman, unpublished analyses of Mid-Mac data;
Schuster et al, 1990). Evidence also suggests that the same is true at younger ages
where lower SES is associated with more troubled peer relations (Bolger et al, 1995).
Relationship to Health 
Research on links between social conflict and health outcomes in
adults is nonexistent except as such conflict relates to psychological distress; evidence
for health effects among children is also largely related to psychological and/or
behavioral outcomes though there is a small literature relating family conflict to
physical health outcomes.
Research from two MacArthur networks indicates that greater social
conflict is associated with greater psychological distress (Ryff, Seeman analyses
of Mid-Mac data) and suggestive evidence that such conflict may also be associated with
greater HPA axis activity, particularly for women (Seeman et al, 1994). Other research
corroborates these findings, showing relationships between social conflict and greater
physiologic arousal both with respect to blood pressure (Ewart et al, 1991; Gerin et al,
1992) and neuroendocrine activity (Kiecolt-Glaser et al, 1994) as well as greater
psychological distress (Schuster et al, 1990; Rook, 1992; for review see also Burg &
Seeman, 1994). Significantly, the impact of social conflict on psychological distress
levels is greater among those living in more crowded homes (Lepore et al, 1991c) an
effect that appears to be partially mediated by reductions in perceptions of control
(Lepore et al, 1992). To date, there does not appear to be any published research linking
more negative aspects of social interaction with adults disease outcomes or
longevity.
As in the case of adults, children exposed to social conflict
exhibit heightened physiological reactivity. Preschoolers exposed to videotapes of angry
adult interactions exhibit increases in heart rate and blood pressure (El-Sheikh et al,
1989). Research also demonstrates relationships between childhood exposure to conflict
and/or physical violence and increased risks for depression (Burge & Hammen, 1991;
Downey & Walker, 1992; Koverola et al, 1993), headaches and stomachaches (Mechanic
& Hansell, 1989), shorter stature at ages 7 and 33 (Montgomery et al, 1997) and
increased risk of mortality (Sorenson & Peterson, 1994). Increased levels of reported
stressors in both day-care and family environments (some reflecting social stressors) have
also been related to increased incidence of respiratory illness though specific measures
of family conflict were not related to illness (Boyce et al, 1995).
Limitations 
Currently the greatest limitations relate to the relative lack of
attention to this aspect of social relationships. They include both the lack of good
measurement instruments as well as the lack of specific research focusing on more negative
aspects of social interaction, either with respect to their relative prevalence across
population subgroups (i.e., descriptive research) or their relationship to health
outcomes.
Network Usage
Measures of social conflict are currently under investigation using
data from both the Successful Aging cohort and the Mid-Mac national survey.
Conclusions 
This area of research has, to date, received much less attention
than have more positive aspects of social interactions in terms of potential relationships
to health outcomes. Existing data suggest that more negative aspects of social interaction
are importantly and negatively related to both SES and health, suggesting that we should
include consideration of both more negative as well as more positive characteristics of
individuals social ties in our models of SES and health. As in the case of social support,
there is no established measure of negative aspects of social interactions, though the
psychometric data from the Mid-Mac scales suggests that these may be a good first choice.
At this time, there has been little or no research on the possible role of such negative
social interactions in the SES-health model. As with positive social interactions, it is
likely that negative qualities of social interactions function as mediators and moderators
of SES effects on health. However, all of these relationships remain to be investigated.
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