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Consciousness can be defined as the state of being aware of and able to think about one's existence, sensations, and surroundings. It encompasses two major components: awareness and arousal. Awareness pertains to the recognition of environmental stimuli and internal states. At the same time, arousal refers to the physiological readiness to engage with these stimuli, which varies significantly between states like sleep and wakefulness.
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Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
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Bioavailability refers to the extent and rate at which a drug reaches systemic circulation in its active form. Extent refers to the amount of the drug that makes it into circulation, while rate is the speed at which it enters circulation. It is influenced by several factors critical for optimizing drug formulations, dosing regimens, and therapeutic outcomes.Physicochemical properties of drugs and formulationsThe solubility, stability, and dissolution rate of a drug significantly impact its...
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Positive affect significantly influences cognitive processes, including evaluation, memory, creativity, and social judgments. Compared to negative affect, positive emotional states promote more favorable interpretations of stimuli, cognitive flexibility, and heuristic processing. These effects highlight emotions' powerful role in shaping how individuals perceive, remember, and interact with the world.Influence on Evaluation and AttributionWhen individuals experience positive affect, they are...
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Cognition plays a pivotal role in shaping emotional experiences, as demonstrated by Schachter and Singer’s two-factor theory of emotion. According to this model, emotion arises from a combination of physiological arousal and cognitive interpretation. The body’s physiological response to stimuli is ambiguous and only gains emotional significance through cognitive labeling. For instance, an increased heart rate and adrenaline surge while standing near an attractive person may be...
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Updated: Jan 24, 2026

SECONDs Administration Guidelines: A Fast Tool to Assess Consciousness in Brain-injured Patients
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Adaptive systems influence both learning and conscious attention.

Gary A Lucas1

  • 1Department of Psychology and Brain Sciences, Indiana University, IN, United States.

Behavioural Processes
|May 21, 2019
PubMed
Summary
This summary is machine-generated.

This study integrates adaptive and associative explanations of behavior by proposing a behavior systems approach. This framework suggests innate biological dispositions influence learning and consciousness, reconciling two major scientific traditions.

Keywords:
Behavior systemsConsciousnessLearningTimberlake

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Area of Science:

  • Behavioral Science
  • Cognitive Science
  • Ethology

Background:

  • Historically, animal behavior was explained by either innate adaptive traits (ethology) or learned associations (conditioning).
  • William Timberlake's behavior systems approach bridged these traditions by integrating innate dispositions into learning.
  • This approach posits that pre-organized adaptive dispositions influence learning by biasing stimulus engagement and response patterns.

Purpose of the Study:

  • To reconcile adaptive and associative accounts of consciousness.
  • To extend the behavior systems approach to understand the biological basis of consciousness.
  • To highlight the role of innate attention systems in conscious awareness.

Main Methods:

  • Survey of William Timberlake's early research on conditioning outcomes.
  • Extension of the behavior systems approach to consciousness.
  • Analysis of how biological dispositions for attention influence conscious experience.

Main Results:

  • The behavior systems approach successfully explains conditioning outcomes by incorporating innate dispositions.
  • Pre-organized biological attention systems bias what is noticed and influence affective states during attention.
  • This framework offers a unified explanation for both learned behavior and conscious awareness.

Conclusions:

  • Innate biological dispositions play a crucial role in both learning and the emergence of consciousness.
  • The behavior systems approach provides a robust framework for integrating diverse explanations of behavior and cognition.
  • Understanding attention systems is key to understanding the biological underpinnings of conscious awareness.