Previous research suggests that social anxiety disorder (SAD) has a specific relationship with impairment in friendship quality; however, potential moderators of this relationship have not been tested. The current study examines whether the specific effect of SAD on friendship quality is stable or varies across gender and ethnicity in a large epidemiological dataset. Results indicate that the u...

A friendship graph is a graph in which every two distinct vertices have exactly one common neighbor. All finite friendship graphs are known, each of them consists of triangles having a common vertex. We extend friendship graphs to two-graphs, a two-graph being an ordered pair G = (G0, G1) of edge-disjoint graphs G0 and G1 on the same vertex-set V (G0) = V (G1). One may think that the edges of G...

Unilateral friendships provide a powerful mechanism to study friendship formation, because these friendships contain interest in friendship, but have not yet become full, reciprocated friendship. This longitudinal study investigated whether the conversations of unilateral dyads identified in the fall were predictive of that dyad’s relationship status in the winter. I hypothesized that the conve...

A distance magic labeling of a graph G = (V, E) of order n is a bijection l : V → {1, 2, . . . , n} with the property that there is a positive integer k (called magic constant) such that w(x) = k for every x ∈ V . If a graph G admits a distance magic labeling, then we say that G is a distance magic graph. In the case of non-regular graph G, the problem of determining whether there is a distance...

Online Social Networking (OSN) services have become among the most popular services on Internet and their growth has led to creation of lots of different applications and protocols. Most of these applications and protocols rely on findings of previous studies which were concentrated on analyzing and modeling of the structure of inferred friendship graph of social networks. However, serious ques...

Why do your friends have more friends than you do? The question may sound offensive. We don’t even know you. How can we assume than you have fewer friends than your friends have on average? Because most people do. This so-called friendship paradox has first been described and studied in [1]. It does seem counterintuitive: If we are talking about the average number of friends of average friends ...

Cooperative relationships, which involve the exchange of altruistic behaviors that are costly to the actor and beneficial to the recipient, are thought to be the product of kin selection or reciprocal altruism. Humans form close, enduring, cooperative relationships with nonrelatives. In these relationships, which we call friendships, both emotional and material support are exchanged. If these r...

The exploratory research reported in this article was designed to determine the processes and outcomes of planning thematic literacy instruction in a holistic and contextualized manner. The work was conducted in an upper-elementary, self-contained setting for students identified as learning disabled. Specifically, the instructional activities included (a) interactive readings from literature on...