(cognitive process) Divided Attention & Intro to Short-term memory (9/30)

Important dates detailed:
- Second midterm exam scheduled for October 20, which will cover chapters 4, 5, and 6.
- Chapters to be covered include topics on attention, short-term memory, and episodic long-term memory.

The lecture aims to conclude the discussion on divided attention and to potentially introduce the concept of short-term memory.

The PRP paradigm relates to the study of divided attention.
Two main approaches:
- Simultaneous presentation of tasks, typically prioritizing one task (shadowing task).
- Asynchronous dual tasks, where stimulus onset asynchrony (SOA) plays a significant role.
- The importance of varying onset times for performance measurement, particularly affecting task two.

A decrease in performance accuracy occurs as SOA decreases, particularly impacting task two.
Telford’s PRP effect (1931), formerly associated with neural refractory periods, is conceptually distinct as the durations observed in PRP (100-500 ms) are significantly longer than physiological refractory times (neurons firing at about 1000 Hz).

Pashler suggests central decision processes create bottlenecks during task performance, leading to differences in task performance under varied SOAs.
Suggests that processing bottlenecks particularly occur during task two when deciding how to respond, while stimulus decisions are quicker due to fewer alternatives.
- Example of fan representations and decision-making elaborated.

Two key decision-making steps identified:
- Stimulus decisions are easier due to filtering processes in the brain.
- Response decisions involve considerable complexities compelling slower reaction times.

Examples provided, illustrating task performance on reaction times, visual representations of task completions support the findings that task one performance remains stable regardless of SOA, while task two suffers significantly.

Participants can often begin stimulus decisions for task two while still processing responses for task one if SOA is longer.
The theory states efficient word recognition can occur outside of conscious attention.

Applications of dual task paradigms in real-world scenarios, such as air traffic control and reading efficiency in adults, particularly suggesting that skill acquisition and experience correlate positively with cognitive performance.
The difference in reading levels enhancing cognitive strategies shows variance between younger and older adults in attentional capacities linked to reading proficiency, with higher reading skills resulting in increased efficiency within processing.

Discussion extends to technological impacts on reading: visual processing increasingly overshadowed by shorter content, emphasizing detailed narrative understanding and processing over rapid visual experiences.
The consequences of lesser reading exposure noted as contributing to a decline in IQ scores among younger generations, despite improving socioeconomic conditions.

The necessity for efficiency in processing is discussed, emphasizing that while automatic processes conserve attentional capacity, controlled processes require conscious deliberation.
Example of skill acquisition through practice with a pianist regarding cognitive load during tasks.

Schneider and Shiffrin’s research illustrates the impact of varied versus consistent task mappings—highlighting police cruiser color changes as impacting recognition and attention.
Important findings suggest that inconsistent mappings disrupt effective processing and that cognitive safety might necessitate maintaining consistently identifiable cues in the environment.

Overview of various attention disorders, comprising ADHD, schizophrenia, and autism detailing their characteristics regarding attention distribution.

Explanation of hemi-neglect due to parietal lobe damage leading to lack of awareness concerning one side of the body.
Cases illustrate practical challenges and therapeutic approaches through prism glasses to expand visual fields effectively, although with a trade-off in resolution.

Transitioning to the discussion of short-term and working memory, the difference between process-oriented and structural models is established, citing figures like Atkinson and Shiffrin.
Baddeley’s working memory model described, including components like central executive function, phonological loop, and visuospatial sketchpad.

A metaphorical representation of working memory likened to a Reese’s peanut butter cup—a combination of processes and structures that work synergistically rather than function separately.

Importance of rehearsal and contextual markers emphasized regarding information retrieval.
Highlighting how neural pathways influence memory accessibility and the effects of interference from new memories on retrieval processes.

Lasting implications for reading proficiency, neurological health, and students’ experience indicating a belief that optimizing cognitive engagement through reading is critical for future generations.

Conciliated that effective cognitive performance demands efficient mapping and attentional strategies in both personal and educational settings amidst ongoing challenges posed by technological advancements.