The Personality Web at item level: network graph of correlational relationships between the 240 items of the NEO-PI-R.

<p>The community structure of this graph has an overall best fit with the standard 5-FS, occurring at r = 0.164, p = 3.08E-04. Node = item, link = significant correlation. Red links: positive correlations. Blue links: negative correlations. Node size = degree (larger nodes are bigger hubs, scale = 1 to 10). For further information, see supporting information (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0051558#pone.0051558.s002" target="_blank">Table S2</a>). The color of the items refers to their standard factor membership, i.e. red: Neuroticism, orange: Extraversion, yellow: Openness, green: Agreeableness, blue: Conscientiousness. Items are grouped together according to their network cluster membership, and clusters are depicted as circles. Clusters are grouped according to size. Five clusters are found that show maximum correspondence to standard factors (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0051558#pone-0051558-t003" target="_blank">Table 3</a>,<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0051558#pone-0051558-t004" target="_blank">4</a>). A small 6th factor is found (right in the graph), consisting of 9 items belonging to extraversion (1 item), openness (3 items), agreeableness (3 item) and neuroticism (2 items). Four isolates (bottom-right corner) consisting of 1 or 2 items were discarded from further analysis. Most of the top 10% hubs are located in the extraversion and neuroticism clusters.