Language, Thinking, and Reasoning: Key Concepts in Cognitive Psychology

Language

Definition and Importance

Language is the communication of information through symbols arranged according to rules. It is central to human communication and closely tied to the way we think and understand the world. Notably, language develops even in the absence of formal instruction, and language acquisition follows similar patterns across cultures.

• Language enables complex thought and social interaction.

• Development occurs naturally, indicating biological predispositions.

Phonemes: The Ingredients

Phonemes are the basic categories of sound produced by our vocal apparatus. They are the smallest units of sound that distinguish meaning in language.

• Most words are made of two or more phonemes.

• Phonemes can be spelled differently (e.g., bait, weight, plate).

• English uses 26 letters but has 40–45 phonemes.

Cross-Linguistic Differences

• Hawaiian language has few phonemes.

• Japanese has a single sound category for both L and R sounds.

Morphemes & Syntax

Morphemes

Morphemes are the smallest units of meaning in a language. Most morphemes are words, but some (like prefixes or suffixes) modify the meaning of other words (e.g., re in redo).

Syntax

Syntax refers to the set of rules by which we construct sentences. For example, "Pizza ate I for dinner" does not follow English syntax, though it may be correct in other languages.

Nonverbal Gestures & Culture

Nonverbal communication, such as gestures, varies across cultures and can convey different meanings. Understanding these differences is crucial for effective cross-cultural communication.

Language Acquisition & Deprivation

Critical Period

There is a critical period during which proficiency at acquiring language is maximal. Being deprived of language during this period impedes the ability to fully acquire and use language.

• Cases like "Genie" support the existence of a critical period, though other factors may complicate outcomes.

• Younger individuals learn new languages more easily ("less is more" theory).

Bilingualism: The Earlier the Better

Early exposure to multiple languages leads to higher proficiency. Research shows that the younger the age of acquisition, the better the outcome in second language proficiency.

Language Development Stages

Babbling

• 1–2 months: cooing

• 4–10 months: babbling (consonants)

• Infants initially babble all sounds, but by 6–8 months, they specialize in their native language.

• Born with ability to recognize all phonemes; unused sounds are pruned by the brain.

Words & Phrases

• 8–16 months: single word stage (e.g., "up", "mama")

• 24 months: two-word stage (e.g., "More juice", "All gone!")

• Telegraphic speech: "I show book"

Sentences & More

• By age 3: use plurals and past tense, but may overgeneralize (e.g., "he runned", "the fishes")

• By age 5: acquire all basic rules of language

How Do Children Acquire Language?

Approach	Description
Learning Theory	Follows principles of reinforcement and conditioning; children are praised for using language; more parental speech leads to greater proficiency; does not fully explain grammar acquisition.
Nativist	Children are born with basic knowledge of language; posits a "language organ" or language acquisition device; genetic factors influence language abilities; difficult to falsify.
Interactionist	Children are pre-programmed with hardware, but develop "software" through exposure and environment; adults act as directors for language acquisition; environment produces differences in language.

Guugu Yimithirr Language

The Guugu Yimithirr language, spoken by indigenous people in Far North Queensland, Australia, uses cardinal directions (north, east, south, west) instead of words for left or right. This influences spatial cognition and communication.

How Does Language Shape Our Thinking?

Linguistic Relativity (Sapir-Whorf Hypothesis)

The language we speak influences how we think, understand, and perceive the world.

• Egocentric vs. geocentric spatial orientation

• Time perception and metaphors

• Language and blame attribution

Thinking & Reasoning

Thinking

Thinking involves the manipulation of mental representations of information. Humans are "cognitive misers," seeking to minimize mental effort.

Top-Down Processes

• Utilize pre-existing knowledge to fill in gaps

• Streamline cognitive functioning and reduce effort

Concepts & Prototypes

• Prototype: The best or most typical example of a concept (e.g., a table).

• Concept: Knowledge and ideas about a set of objects, actions, or characteristics that share core properties.

• Prototypes can lead to biased judgments and reinforce stereotypes.

Cognitive Obstacles

• Mental Set: Becoming stuck in a specific problem-solving strategy, inhibiting alternative solutions.

• Functional Fixedness: Difficulty conceptualizing that an object typically used for one purpose can be used for another.

Reasoning/Problem Solving

Algorithms

• Rules that guarantee a solution if applied correctly

• Effective for well-defined problems but time-consuming

Heuristics

• General problem-solving frameworks (shortcuts, rules of thumb)

• Useful for simplifying decisions but can introduce bias

Heuristics in Decision-Making

Why Are Heuristics Useful?

• Impossible to consider all information

• Reduce mental effort

• Simplify decision-making

• Often correct, but can lead to errors

Representativeness Heuristic

Basing judgments on similarity to an abstract ideal, expectation, or stereotype. Can lead to the base rate fallacy, where base rates are not sufficiently considered.

Real-World Applications

• Jury decisions (guilt/credibility)

• Medical diagnoses

• Restaurant choices

• Stereotyping in social interactions

Availability Heuristic

Basing estimates of frequency or probability on how easily examples come to mind. Media coverage of rare events (e.g., shark attacks) can make them seem more common.

Example Study

• Karlsson, Loewenstein & Ariely (2008): People are more likely to buy insurance after experiencing a natural disaster.

Anchoring Heuristic

Relying on a single piece of information (the anchor) to inform decision-making.

When Prosecutor Sought	Judge's Sentence
12 months	18.70 months
34 months	28.78 months

Framing

The way a question or statement is formulated can influence decision-making. Gain vs. loss framing and survival vs. mortality framing are common examples.

• "We can treat your cancer with surgery, which has a 90% post-procedure survival rate and a 34% five-year survival rate."

• "We can treat your cancer with surgery, which has a 10% post-procedure fatality rate and a 66% five-year fatality rate."

COVID-19 & Framing

• Loss-framed messages increase anxiety but do not impact policy attitudes or behavioral intentions.

• Emotional toll of loss-framed messages is significant.

Hindsight Bias

The tendency to overestimate how well we could have predicted something after it has already occurred. This bias clouds judgment and impairs learning from past mistakes.

Monday Morning Quarterback Phenomena

Describes someone who critiques how an event was handled after the fact, believing they could have predicted or managed it better.

Confirmation Bias & Belief Perseverance

• Confirmation Bias: Searching for or paying attention only to evidence that confirms one's beliefs.

• Belief Perseverance: Remaining committed to a decision or belief even in the face of contrary evidence.

Maximizing & Satisficing

Two types of decision-making strategies:

• Satisficers: Settle for "good enough" options.

• Maximizers: Evaluate every option, seeking the best possible choice.

• Paradox of Choice: More options can lead to less satisfaction.

	6 Alternatives	30 Alternatives	Difference
Maximizers	5.64	4.73	-0.91
Satisficers	5.44	6.00	+0.46

The Downside of Heuristics & Cognitive Shortcuts

• Can lead to costly errors and bias, especially in high-stakes situations (e.g., wrongful criminal convictions, stereotyping, racialization in media).

• Trade-off between accuracy and effort.

Case Studies

• Guy Paul Morin: Wrongfully convicted due to being perceived as a "weird guy"—an example of representativeness heuristic leading to error.

• Amanda Knox: Media speculation and stereotyping influenced public perception and legal outcomes.

Additional info: These notes expand on the original slides by providing definitions, examples, and context for key psychological concepts in language, thinking, and reasoning.