Related Experiment Video
Updated: Feb 15, 2026
07:51
Administration of Δ9-Tetrahydrocannabinol (THC) in Adolescent and Adult Mice
Published on: August 1, 2025
1.1K
Intrasexual Competition and Height in Adolescents and Adults
P Polo1,2, A Fernandez3, J A Muñoz-Reyes1
11 Laboratorio de Comportamiento Animal y Humano, Centro de Estudios Avanzados, Universidad de Playa Ancha, Valparaíso, Chile.
Summary
Men
Area of Science:
- Evolutionary Psychology
- Human Mating Behavior
Background:
- Intrasexual competition is a key factor in sexual selection.
- Height is a sexually dimorphic trait potentially influencing mating strategies.
Purpose of the Study:
- To investigate the relationship between height and intrasexual competitiveness in Chilean adolescents and adults.
- To explore sex differences in the association between height and competitiveness.
Main Methods:
- Survey research involving adolescent and adult populations in Chile.
- Assessment of individual differences in intrasexual competitiveness.
- Statistical analysis of height and competitiveness data.
Main Results:
- Among men, greater height was associated with lower intrasexual competitiveness.
- No significant linear or quadratic relationship was found between height and intrasexual competitiveness in women.
- Adolescents exhibited higher intrasexual competitiveness than adults.
Conclusions:
- Height may play a significant role in male mating competition.
- The influence of height on female mating competition appears more complex and potentially mediated by other factors.
- Age-related differences in intrasexual competitiveness were observed.
Related Concept Videos
01:24Revisionist Views of Adolescent and Adult Cognition
319
A revisionist approach to Jean Piaget's theory of cognitive development has brought new insights that challenge and reinterpret his established ideas. Piaget proposed that the formal operational stage, emerging in adolescence, represents the culmination of cognitive maturity. During this stage, individuals are said to develop abstract thinking, engage in systematic problem-solving, and show a form of egocentrism, believing others are as preoccupied with their behavior as they are...
319
02:34Competition
25.1K
When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.
25.1K
01:18Cognitive Development During Adolescence
654
During adolescence, individuals experience significant cognitive development that enhances their understanding of others' emotions and thoughts, known as cognitive empathy. This period is marked by an increased ability to adapt to others' perspectives and a more nuanced understanding of others' mental states, a skill that is foundational for social problem-solving and conflict avoidance. The development of cognitive empathy relies heavily on the theory of mind — the...
654
01:17Erikson's Theory on Socioemotional Development during Adolescence
1.3K
Erik Erikson's fifth stage of psychosocial development, "identity versus role confusion," is crucial during adolescence (ages 12 to 18). In this stage, adolescents face the developmental task of forging a distinct personal identity, a process influenced by social, psychological, and biological changes typical of this period. Adolescents naturally explore different roles, behaviors, and ideologies as they navigate complex questions of self-concept, asking, "Who am I?" and "What is my place in...
1.3K
01:33Adult Stem Cells
33.9K
Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
33.9K
01:11Nondepolarizing (Competitive) Neuromuscular Blockers: Pharmacokinetics
822
All neuromuscular blocking agents are injected intravenously because they are poorly absorbed from the GI tract. Rapid onset is achieved with intravenous administration, although absorption is also adequate from an intramuscular injection. Since these agents are highly ionized, they do not readily penetrate cell membranes or cross the blood-brain barrier.
Instead, they are transported by the blood to different tissues. Muscles with a greater blood supply (arteries) and blood flow receive more...
Instead, they are transported by the blood to different tissues. Muscles with a greater blood supply (arteries) and blood flow receive more...
822