Language and Language Development
Core concepts a candidate must command
Language is a system with five interlocking subsystems: phonology (sound system), morphology (word formation, inflection, derivation), syntax (sentence structure), semantics (word and sentence meaning), and pragmatics (social rules of use). Second-language development runs through recognizable stages: a pre-production/silent period, early production, speech emergence, intermediate fluency, and advanced fluency. Krashen's framework remains the naming convention on this exam: comprehensible input (i + 1), a natural order of acquisition, the affective filter (anxiety, low motivation, and embarrassment block intake), and the distinction between subconscious acquisition and conscious learning.
Cummins's BICS/CALP distinction is the single most tested idea in this domain. Conversational proficiency (BICS) typically emerges in one to three years; academic language proficiency (CALP) takes five to seven or more. Academic language has its own features: nominalization, technical vocabulary, passive voice, complex clause embedding, and text-structure genre conventions. Cross-linguistic transfer is expected and useful - cognates, literacy strategies, and content knowledge move across languages - while interference produces predictable, patterned errors that reflect the first language rather than carelessness.
Traps question writers set
- Treating fluent playground conversation as proof of English proficiency.
- Labeling the silent period as a disability. Silence is developmental - but a persistent pattern of no growth in *either* language, with good instruction, warrants referral.
- Claiming code-switching shows confusion; it is a normal, rule-governed bilingual strategy.
- Mixing up acquisition and learning: worksheets and drills build monitored *learning*, not the implicit system used in fluent speech.
Rule of thumb
Ask "difference or disorder?" A fourth grader, two years in U.S. schools, chats easily at recess but reads expository text far below grade level. Verdict: BICS is developed, CALP is still emerging - scaffold, don't refer. If the same student showed limited vocabulary and grammar in both languages with flat progress despite strong instruction, that pattern points toward further evaluation.
Quick contrast
- BICS: context-embedded, cognitively undemanding.
- CALP: context-reduced, cognitively demanding.