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Related Concept Videos

Psychodynamic Perspectives on Personality01:27

Psychodynamic Perspectives on Personality

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The psychodynamic perspective in psychology asserts that most personality functions operate unconsciously, outside of awareness. This means that the motives and emotions driving behavior often remain hidden, automatically buried in the unconscious mind as a defense mechanism to shield us from psychological distress. According to this theory, the unconscious mind contains thoughts, memories, and emotions that are too disturbing to face directly.
Psychodynamic theorists argue that unconscious...
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The Behavioral Perspective on Personality01:19

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Behaviorists view personality as primarily shaped by environmental reinforcements and consequences. According to this perspective, behavior is influenced by external stimuli, and individuals adjust their actions based on rewards and punishments. Over time, learning histories — accumulated patterns of reinforcement — play a significant role in shaping personality. Behaviors that lead to positive outcomes are reinforced, while those resulting in negative outcomes are diminished.
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Criticisms of the Evolutionary Perspective01:23

Criticisms of the Evolutionary Perspective

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In a study where individuals posing as strangers offered compliments and proposed casual sex to students, the responses differed significantly based on gender. Not a single woman accepted the proposal, while 70% of the men agreed. This outcome provides a useful scenario to explore through the lens of evolutionary psychology and social learning theory, highlighting the diverse perspectives on human sexual behaviors.
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Social Cognitive Perspective on Personality01:30

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Social cognitive perspectives on personality emphasize the importance of conscious awareness, beliefs, expectations, and goals in shaping behavior. These perspectives incorporate behaviorist principles, such as learning through reinforcement and conditioning, but extend beyond them by highlighting human reasoning and planning. Unlike traditional behaviorist views, social cognitive theory focuses on how individuals reflect on their past experiences and plan for future outcomes by considering...
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Phase-lead and Phase-lag Controllers01:22

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Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
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The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
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Lipidico Injection Protocol for Serial Crystallography Measurements at the Australian Synchrotron
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Lead Toxicity: an Australian Perspective.

Gemma M Daley1, Carel J Pretorius1,2, Jacobus Pj Ungerer1,2

  • 1Department of Chemical Pathology, Pathology Queensland Central Laboratory, University of Queensland, Brisbane, Qld 4006, Australia.

The Clinical Biochemist. Reviews
|March 5, 2019
PubMed
Summary
This summary is machine-generated.

Lead toxicity, or plumbism, remains a persistent health issue despite historical awareness. Primary prevention is crucial as no safe lead level exists, especially for vulnerable populations like children.

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Area of Science:

  • Environmental Health
  • Toxicology
  • Public Health

Background:

  • Plumbism (lead toxicity) has a long history of human exposure and adverse effects.
  • Despite historical knowledge, lead exposure remains a contemporary issue, affecting all age groups.
  • Modern analytical methods confirm there is no safe level of lead exposure.

Purpose of the Study:

  • To highlight the persistent problem of lead toxicity (plumbism) in modern society.
  • To emphasize the critical need for primary prevention strategies.
  • To discuss the limited evidence for chelation therapy's effectiveness.

Main Methods:

  • Review of historical and contemporary cases of plumbism.
  • Analysis of current understanding of lead toxicology.
  • Evaluation of treatment efficacy for lead exposure.

Main Results:

  • Lead toxicity continues to be identified in contemporary populations, including children.
  • Evidence supporting chelation therapy for improving outcomes in lead-exposed individuals is limited.
  • No safe threshold for lead in the human body has been established.

Conclusions:

  • Primary prevention of lead exposure is paramount due to the lack of a safe lead level.
  • Focus on preventative measures is essential, particularly for vulnerable groups.
  • The limited efficacy of current treatments underscores the importance of avoiding exposure.