scholarly journals Linking consistent individual differences in web structure and behavior in black widow spiders

2016 ◽  
Vol 27 (5) ◽  
pp. 1424-1431 ◽  
Author(s):  
Nicholas DiRienzo ◽  
Pierre-Olivier Montiglio
Keyword(s):  
Individual Differences ◽  
Black Widow ◽  
Web Structure ◽  
Black Widow Spiders ◽  
And Behavior

scholarly journals Game of webs: species and web structure influence contest outcome in black widow spiders

2019 ◽  
Vol 31 (1) ◽  
pp. 32-42 ◽  
Author(s):  
Cameron Jones ◽  
Lea Pollack ◽  
Nicholas DiRienzo
Keyword(s):  
Individual Variation ◽  
Native Species ◽  
Interspecific Interactions ◽  
Population Level ◽  
Black Widow ◽  
Trait Variation ◽  
Web Structure ◽  
Contest Outcome ◽  
Black Widow Spiders ◽  
The Web

Abstract Population-level trait variation within species plays an often-overlooked role in interspecific interactions. In this study, we compared among-individual variation in web phenotype and foraging behavior between native black widows (Latrodectus hesperus) and invasive brown widows (Latrodectus geometricus). We staged repeated contests whereby native widows defended their webs against intruders of both species to 1) investigate how trait variation mediates web contest outcome among native widows and 2) see whether widow behavior differs in response to an invasive spider. In only one trait, the average number of foraging lines, did black widows differ from brown widows. Black widow residents that built more structural lines were more likely to successfully defend their webs from conspecific intruders (i.e., be the sole spider remaining on the web postinteraction). This association between web structure and contest outcome did not exist in trials between black widows and invasive brown widows; however, in interspecific interactions, these same residents were more likely to have intruders remain on the web rather than drive them away. Surprisingly, brown widows did not usurp black widows. Brown widows were never observed signaling, yet black widow residents signaled equally to intruders of both species. Our results suggest that among-individual variation among native species can influence the response toward invasive competitors and outcome of these interactions.

scholarly journals Foraging behavior and extended phenotype independently affect foraging success in spiders

2020 ◽  
Vol 31 (5) ◽  
pp. 1242-1249 ◽  
Author(s):  
N DiRienzo ◽  
H A Schraft ◽  
P O Montiglio ◽  
C T Bradley ◽  
A Dornhaus
Keyword(s):  
Prey Capture ◽  
Phenotypic Traits ◽  
Foraging Success ◽  
Black Widow ◽  
Live Prey ◽  
Correlational Selection ◽  
Web Structure ◽  
Functional Consequences ◽  
Black Widow Spiders ◽  
Insight Into

Abstract Multiple phenotypic traits often interact with each other to determine an individual’s fitness. Behavioral and extended phenotypic traits, such as architectural constructions, can contribute to fitness in an integrated way. The goal of this study was to understand how the interaction between behavioral and extended phenotypic traits can affect foraging success. We tested this question using black widow spiders, where spiders that are aggressive in a foraging context tend to build more gumfooted silk lines that aid in prey capture, while non-aggressive spiders build webs with fewer gumfooted lines. We repeatedly assessed behavior and web structure to quantify relationships between these traits, and then allowed spiders to forage for live prey on their own web or the web of a conspecific that differed in structure. Thus, we assessed how varying combinations of behavior and web structure affect foraging success, and if correlational selection might act on them. We confirmed that aggressiveness and number of gumfooted lines are positively correlated and found that capture success increased with both aggressiveness and the number of gumfooted lines. Yet, we did not find any evidence for correlational selection: aggressiveness and number of gumfooted lines appeared to affect foraging success independently of each other. These findings highlight that a correlation between traits that contribute towards the same ecological function does not necessarily imply correlational selection. Taking advantage of the experimental convenience afforded by extended phenotypic traits can provide insight into the functional consequences of phenotypic variation within and between individuals.

Individual Differences in the Name Similarity Effect

2014 ◽  
Vol 35 (2) ◽  
pp. 111-118
Author(s):  
Daniel J. Howard ◽  
Roger A. Kerin
Keyword(s):  
Individual Differences ◽  
Impression Management ◽  
Interactive Effect ◽  
Purchase Intentions ◽  
Brand Attitude ◽  
Self Monitoring ◽  
Similarity Effect ◽  
And Behavior ◽  
Usage Context

The name similarity effect is the tendency to like people, places, and things with names similar to our own. Although many researchers have examined name similarity effects on preferences and behavior, no research to date has examined whether individual differences exist in susceptibility to those effects. This research reports the results of two experiments that examine the role of self-monitoring in moderating name similarity effects. In the first experiment, name similarity effects on brand attitude and purchase intentions were found to be stronger for respondents high, rather than low, in self-monitoring. In the second experiment, the interactive effect observed in the first study was found to be especially true in a public (vs. private) usage context. These findings are consistent with theoretical expectations of name similarity effects as an expression of egotism manifested in the image and impression management concerns of high self-monitors.

Individual Uniqueness in the Neonatal Functional Connectome

2021 ◽  
Author(s):  
Qiushi Wang ◽  
Yuehua Xu ◽  
Tengda Zhao ◽  
Zhilei Xu ◽  
Yong He ◽  
...  
Keyword(s):  
Individual Differences ◽  
Individual Identification ◽  
Imaging Data ◽  
Functional Connectome ◽  
Middle Range ◽  
Human Connectome Project ◽  
The Individual ◽  
And Behavior ◽  
Identification Analysis ◽  
The Brain

Abstract The functional connectome is highly distinctive in adults and adolescents, underlying individual differences in cognition and behavior. However, it remains unknown whether the individual uniqueness of the functional connectome is present in neonates, who are far from mature. Here, we utilized the multiband resting-state functional magnetic resonance imaging data of 40 healthy neonates from the Developing Human Connectome Project and a split-half analysis approach to characterize the uniqueness of the functional connectome in the neonatal brain. Through functional connectome-based individual identification analysis, we found that all the neonates were correctly identified, with the most discriminative regions predominantly confined to the higher-order cortices (e.g., prefrontal and parietal regions). The connectivities with the highest contributions to individual uniqueness were primarily located between different functional systems, and the short- (0–30 mm) and middle-range (30–60 mm) connectivities were more distinctive than the long-range (>60 mm) connectivities. Interestingly, we found that functional data with a scanning length longer than 3.5 min were able to capture the individual uniqueness in the functional connectome. Our results highlight that individual uniqueness is present in the functional connectome of neonates and provide insights into the brain mechanisms underlying individual differences in cognition and behavior later in life.

scholarly journals The Psychology of Authenticity

2019 ◽  
Vol 23 (1) ◽  
pp. 8-18 ◽  
Author(s):  
George E. Newman
Keyword(s):  
Individual Differences ◽  
Different Populations ◽  
Degree Of Convergence ◽  
And Behavior ◽  
Future Work

Perceptions of authenticity (or, inauthenticity) have been shown to affect people’s judgments and behavior across a wide variety of domains. However, there is still ambiguity about how the concept should be defined. This is attributable, at least in part, to a growing list of different “kinds of authenticity” with little discussion of the potential overlaps between them. The goal of this paper is to reduce these various notions of authenticity into a more manageable set of constructs. Building on the work of Newman and Smith (2016a), three broad kinds of authenticity are proposed: Historical, Categorical, and Values authenticity. Two studies then examine the extent to which people’s conceptions of authenticity naturally segment into these three types. Specifically, Study 1 asks participants about the various ways in which they might assess authenticity, whereas Study 2 examines individual differences in sensitivity to different kinds of inauthenticity. The results from both studies indicate a striking degree of convergence in support of these three broad dimensions. Moreover, different populations appear to be differentially concerned about these various ways of evaluating authenticity. The implications of this framework for existing and future work in this area are discussed.

Black widow spiders in an urban desert: Population variation in an arthropod pest across metropolitan Phoenix, AZ

2011 ◽  
Vol 15 (3) ◽  
pp. 599-609 ◽  
Author(s):  
Patricia Trubl ◽  
Theresa Gburek ◽  
Lindsay Miles ◽  
J. Chadwick Johnson
Keyword(s):  
Population Variation ◽  
Black Widow ◽  
Black Widow Spiders ◽  
Arthropod Pest

scholarly journals Effects of the physical and social environment on youth cognitive performance

2020 ◽  
Author(s):  
Wesley J Meredith ◽  
Carlos Cardenas-Iniguez ◽  
Marc Berman ◽  
Monica Rosenberg
Keyword(s):  
Individual Differences ◽  
Cognitive Performance ◽  
Cognitive Abilities ◽  
Sociodemographic Factors ◽  
National Database ◽  
Brain Functioning ◽  
Unique Variance ◽  
Children's Home ◽  
And Behavior ◽  
Caregiver Report

Individual differences in children’s cognitive abilities impact life and health outcomes. What factors influence these individual differences during development? Here we test whether children’s environments predict cognitive performance, independent of well- characterized socioeconomic effects. We analyzed data from 9002 9–10-year-olds from the Adolescent Brain Cognitive Development Study, an ongoing longitudinal study with community samples across the U.S.A. Using youth- and caregiver-report questionnaires and national database registries (e.g., neighborhood crime, walkability), we defined principal components summarizing children’s home, school, neighborhood, and cultural environments. In two independent samples (ns = 3475, 5527), environmental components explained unique variance in children’s general cognitive ability, executive functioning, and learning/memory abilities. Furthermore, increased neighborhood enrichment was associated with a decreased relationship between sociodemographics and general cognitive abilities. Thus, the environment explains unique variance in cognitive performance in development and should be considered alongside sociodemographic factors to understand brain functioning and behavior.

Emotion and Behavior: A General Factor of Personality From the EAS Temperament Survey and the Strengths and Difficulties Questionnaire

2012 ◽  
Vol 15 (5) ◽  
pp. 668-671 ◽  
Author(s):  
Livia Veselka ◽  
Julie Aitken Schermer ◽  
Caroline Just ◽  
Yoon-Mi Hur ◽  
J. Philippe Rushton ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Individual Differences ◽  
Social Desirability ◽  
Principal Factor ◽  
Strengths And Difficulties Questionnaire ◽  
General Factor ◽  
Order Dimension ◽  
General Factor Of Personality ◽  
Strengths And Difficulties ◽  
And Behavior

The mothers of 603 pairs of 3- to 13-year-old twins in Korea completed the Emotionality, Activity, Sociability (EAS) Temperament Survey and the Strengths and Difficulties Questionnaire in reference to their twins. Principal factor analysis of the seven scales comprising these measures yielded a general factor on which all the scales had moderate to large loadings. Univariate behavioral genetic analyses showed that individual differences on this general factor could best be accounted for by additive genetic and non-shared environmental effects, with a heritability of 53%. The results strengthen the construct validity of the general factor of personality (GFP) by extracting this higher-order dimension from disparate measures, and have implications regarding social desirability criticisms applied to the GFP theory.

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