Moving research on health and close relationships forward—a challenge and an obligation: Introduction to the special issue.

The worldwide temperate subtribe Poinae comprises the largest grass genus, Poa (500+ species), and multiple additional small genera. We explore generic boundaries and relationships among genera of Poinae using nuclear ribosomal internal transcribed spacer data (ITS) and plastid trnT–trnL–trnF (TLF) sequence data. ITS and TLF analyses are mostly congruent with regards to circumscription of genera, and with respect to relationships among Poinae genera, but tree structure is generally better supported among genera in the ITS strict consensus tree. ITS and TLF both support two main Poinae lineages: (i) Poa and (ii) a clade comprising all other sampled Poinae. Nine small genera were nested within the large Poa clade, including Aphanelytrum , Dissanthelium , and Tovarochloa , supporting inclusion of these as sections within Poa. In the second clade, three subclades support close relationships among Nicoraepoa , Hookerochloa , and Arctagrostis ; Arctophila and Dupontia ; and Apera , Bellardiochloa , and Ventenata . Genera of the related subtribes Alopecurinae, Cinninae, and Miliinae were mixed among or in part external to Poinae in different ways in ITS and TLF analyses, and only subtribe Puccinelliinae was strongly supported and monophyletic. ITS analyses supported placement of Catabrosella , Hyalopoa , and Paracolpodium in Puccinelliinae (no TLF data available). The position of Poa subgenus Arctopoa is incongruent between the two analyses: TLF data support inclusion within Poa and ITS data place it outside of Poa. Similarly, TLF data resolves the genus Aniselytron outside of Poa, whereas ITS data place it within Poa. Based on these results and a consideration of morphology, we recognize Arctopoa and Aniselytron as genera, probably of ancient hybrid origins. Nothogenus × Duarctopoa is coined for Arctopoa × Dupontia, with a single nothospecies × Duarctopoa labradorica . A new combination is provided for Poa subg. Sylvestres .

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Advancing understanding of the mechanistic pathways underlying close relationships and physical health: Conclusion to the special issue

Personal Relationships ◽

10.1111/pere.12350 ◽

2020 ◽

Vol 27 (4) ◽

pp. 956-960

Author(s):

Allison K. Farrell ◽

Sarah C. E. Stanton ◽

Jeffry A. Simpson

Keyword(s):

Physical Health ◽

Close Relationships ◽

Special Issue

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Dyadic and group perspectives on close relationships

International Journal of Behavioral Development ◽

10.1080/01650250444000450 ◽

2005 ◽

Vol 29 (2) ◽

pp. 97-100 ◽

Cited By ~ 41

Author(s):

Brett Laursen

Keyword(s):

Human Development ◽

Social Relations ◽

Close Relationships ◽

Entire Group ◽

Special Issue ◽

Social Relations Model ◽

Actor Partner Interdependence Model ◽

The Social ◽

The Relationship ◽

Data Analytic

Recent advances in the study of close relationships hold the potential for new insignts into the significance of interdependence and the mechanism of relationship influence. The papers in this special issue apply two new data analytic techniques to the study of family and friend relationships. The Actor–Partner Interdependence Model incorporates the perspectives of both participants in a dyad into analyses that describe shared and unique views of the relationship. The Social Relations Model incorporates the perspectives of all members of a group into analyses that ascribe views unique to individuals and relationships, and views shared by the entire group. Developmental applications of techniques originally designed for concurrent interdependent data are described with the aim of advancing these analytic procedures to the study of lifespan human development.

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Cooperation and obligation in early parent-child relationships

Behavioral and Brain Sciences ◽

10.1017/s0140525x19002474 ◽

2020 ◽

Vol 43 ◽

Author(s):

Ross A. Thompson

Keyword(s):

Social Norms ◽

Moral Psychology ◽

Close Relationships ◽

Social Agency ◽

Infant Survival ◽

Peer Experiences ◽

Early Experiences ◽

Early Parent ◽

Collaborative Skills ◽

Parent Child Relationships

Abstract Tomasello's moral psychology of obligation would be developmentally deepened by greater attention to early experiences of cooperation and shared social agency between parents and infants, evolved to promote infant survival. They provide a foundation for developing understanding of the mutual obligations of close relationships that contribute (alongside peer experiences) to growing collaborative skills, fairness expectations, and fidelity to social norms.

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