Elaine N. Aron

Inclusion of Other in the Self Scale and the structure of interpersonal closeness.

In 2 studies, the Inclusion of Other in the Self (IOS) Scale, a single-item, pictorial measure of closeness, demonstrated alternate-form and test-retest reliability; convergent validity with the Relationship Closeness Inventory (Berscheid, Snyder, & Omoto, 1989), the Sternberg (1988) Intimacy Scale, and other measures; discriminant validity; minimal social desirability correlations; and predictive validity for whether romantic relationships were intact 3 months later

Close relationships as including other in the self

The cognitive significance of being in a close relationship is described in terms of including other in the self (in Lewins sense of overlapping regions of the life space and in Jamess sense of the self as resources, perspectives, and characteristics). Experiment 1, adapting Liebrands (1984) deco

The Experimental Generation of Interpersonal Closeness: A Procedure and Some Preliminary Findings:

A practical methodology is presented for creating closeness in an experimental context. Whether or not an individual is in a relationship, particular pairings of individuals in the relationship, and circumstances of relationship development become manipulated variables. Over a 45-min period subject pairs carry out self-disclosure and relationship-building tasks that gradually escalate in intensity. Study 1 found greater postinteraction closeness with these tasks versus comparable small-talk tasks. Studies 2 and 3 found no significant closeness effects, inspite of adequate power, for (a) whether pairs were matched for nondisagreement on important attitudes, (b) whether pairs were led to expect mutual liking, or (c) whether getting close was made an explicit goal. These studies also illustrated applications for addressing theoretical issues, yielding provocative tentative findings relating to attachment style and introversion/extraversion.

Sensory-processing sensitivity and its relation to introversion and emotionality.

Over a series of 7 studies that used diverse samples and measures, this research identified a unidimensional core variable of high sensory-processing sensitivity and demonstrated its partial independence from social introversion and emotionality, variables with which it had been confused or subsumed in most previous theorizing by personality researchers. Additional findings were that there appear to be 2 distinct clusters of highly sensitive individuals (a smaller group with an unhappy childhood and related variables, and a larger group similar to nonhighly sensitive individuals except for their sensitivity) and that sensitivity moderates, at least for men; the relation of parental environment to reporting having had an unhappy childhood. This research also demonstrated adequate reliability and content, convergent, and discriminant validity for a 27-item Highly Sensitive Person Scale.

Including others in the self

We propose that to some extent, people treat the resources, perspectives, and identities of close others as their own. This proposal is supported by allocation, attribution, response time, and memory experiments. Recently, we have applied this idea to deepening understanding of feeling “too close” (including too much of the other in the self leading to feeling controlled or a loss of identity), the effects of relationship loss (it is distressing to the extent that the former partner was included in the self, liberating to the extent that the former partner was preventing self-expansion), ingroup identification (including ingroup in the self), and the effect of outgroup friendships on outgroup attitudes (including outgroup member in the self entails including outgroup members identity in the self).

Falling in love: Prospective studies of self-concept change.

Two prospective, longitudinal studies examined the consequences of falling in love, focusing on predictions developed in the context ofA. Aron and E. N. Arons (1986, in press) self-expansion model of motivation and cognition in close relationships. In each study a sample with a high expected incidence of falling in love (first- and second-year undergraduates in the fall term) was tested 5 times over 10 weeks. At each testing participants indicated whether they had fallen in love and either made open-ended lists of self-descriptive terms (Study 1 ; N = 329) or completed standard self-efficacy and self-esteem measures (Study 2 ; N = 529). As predicted, after falling in love there was greater change and increased diversity of self-concept domains (Study I) and increased self-efficacy and self-esteem (Study 2). Partial correlation analyses suggested that results in both studies were not due to mood change.

Sensory Processing Sensitivity: A Review in the Light of the Evolution of Biological Responsivity

This article reviews the literature on sensory processing sensitivity (SPS) in light of growing evidence from evolutionary biology that many personality differences in nonhuman species involve being more or less responsive, reactive, flexible, or sensitive to the environment. After briefly defining SPS, it first discusses how biologists studying animal personality have conceptualized this general environmental sensitivity. Second, it reviews relevant previous human personality/temperament work, focusing on crossover interactions (where a trait generates positive or negative outcomes depending on the environment), and traits relevant to specific hypothesized aspects of SPS: inhibition of behavior, sensitivity to stimuli, depth of processing, and emotional/physiological reactivity. Third, it reviews support for the overall SPS model, focusing on development of the Highly Sensitive Person (HSP) Scale as a measure of SPS then on neuroimaging and genetic studies using the scale, all of which bears on the extent to which SPS in humans corresponds to biological responsivity.

Adult Shyness: The Interaction of Temperamental Sensitivity and an Adverse Childhood Environment

This article examines the relation between adult shyness and sensory-processing sensitivity and posits a new model in which the interaction of sensitivity and adverse childhood environment leads to negative affectivity (with the highly sensitive being more impacted), which in turn leads to shyness. Consistent with this model, two questionnaire studies (Ns = 96 and 213) supported three hypotheses: (a) sensory-processing sensitivity interacts with recalled quality of childhood parental environment to predict shyness, (b) sensory-processing sensitivity interacts in the same way with childhood environment to predict negative affectivity, and (c) the interaction effect on negative affectivity mediates the effect on shyness. Hypothesis 2 was tested and supported in an additional questionnaire study (N = 393) and also in an experiment (N = 160) that manipulated negative contemporaneous experience as an analog for adverse childhood environment.

Temperament trait of sensory processing sensitivity moderates cultural differences in neural response

This study focused on a possible temperament-by-culture interaction. Specifically, it explored whether a basic temperament/personality trait (sensory processing sensitivity; SPS), perhaps having a genetic component, might moderate a previously established cultural difference in neural responses when making context-dependent vs context-independent judgments of simple visual stimuli. SPS has been hypothesized to underlie what has been called inhibitedness or reactivity in infants, introversion in adults, and reactivity or responsivness in diverse animal species. Some biologists view the trait as one of two innate strategies-observing carefully before acting vs being first to act. Thus the central characteristic of SPS is hypothesized to be a deep processing of information. Here, 10 European-Americans and 10 East Asians underwent functional magnetic resonance imaging while performing simple visuospatial tasks emphasizing judgments that were either context independent (typically easier for Americans) or context dependent (typically easier for Asians). As reported elsewhere, each group exhibited greater activation for the culturally non-preferred task in frontal and parietal regions associated with greater effort in attention and working memory. However, further analyses, reported here for the first time, provided preliminary support for moderation by SPS. Consistent with the careful-processing theory, high-SPS individuals showed little cultural difference; low-SPS, strong culture differences.

Motivations for Unreciprocated Love

Consistent with a mini-theory of motivational factors in unreciprocated love, (a) perceived potential value of a relationship with another; perceived probability of such a relationship; and desirability of the state of being in love with this other, even if it is unreciprocated, were each significantly and independently predictive of reported intensity of unreciprocated love; (b) incidence of unreciprocated love was greatest for those whose self-reported attachment style was anxious/ambivalent; and (c) perceived potential value of the relationship was most predictive of intensity for anxious/ambivalents and perceived desirability of the state was most predictive of intensity for avoidants. Findings are based on structural equation modeling analyses of questionnaire responses from a moderately large sample of U.S. undergraduates and were not qualified by gender.