Learning the names and sounds of letters is one of the first steps in reading acquisition. Students often struggle with learning the letters of similar shapes before age four (Thompson, 2009; Molfese et al., 2006). Older students learn and recall letter names and sounds at a higher rate than younger students; older students often have higher cognitive skills. Thompson noted that students typically learn upper case letters before learning lower case letters because the letters classified as having “cross-case visual dissimilarity” are easier for younger students to learn (p. 58). Eight letters are classified as having this cross-case dissimilarity: Aa, Bb, Dd, Ee, Gg, Hh, Nn, and Rr. Learning the corresponding sounds to the letters can also be a challenge. Several studies have found that letter knowledge is related to a student’s phonological skills and cognitive abilities (Molfese et al., 2008; Leppänen, Aunola, Niemi, & Nurmi, 2008; Thompson, 2009). The higher a child’s cognitive processing skills are the higher his rate of letter acquisition. Leppänen et al. and Molfese et al. argued, respectively, that letter knowledge at the end of kindergarten is the best predictor of language skills in grade 4 and in grade 6.
Letter knowledge also involves the idea that each letter has one corresponding sound; some letters have up to three corresponding sounds. The letter sounds also change when the letters are combined with other letters to form words. The letter sounds and rules of letter sounds are part of phonological awareness, which includes a student’s ability to process letter sounds, rhyming words, and segmenting letters within words (Molfese et al., 2006). Phonological awareness is part of the dual route cognitive processing that changes letters into words. Phonological awareness level affects the ability of students to retain individual letter knowledge. Students who demonstrate low phonological awareness skills often need intervention to stay at grade level. However, these phonological awareness skills play a smaller part in reading as students get older. The transition begins
Socio-economic status (SES) can also impact letter knowledge skills for children. For example, children of low SES are usually at a disadvantage when they begin their formal education because they typically have had less exposure to written and spoken words. Parents of low SES are also less likely to have written material in their homes, and they are less likely to read to their children. Parents of low SES children typically have less formal education than parents of higher SES children. High phonological awareness skills will void the effects of lower SES (Nobel, Farah, & McCandliss, 2006).
Phonological awareness skills are more important during the early years of education when children are learning to read (Vaessen & Blomert, 2009). Earlier language skills often predict later phonological awareness skills (Peterson, Pennington, Shriberg, & Boada, 2009). The phonological processing skills of students also determine their rate of letter identification (Molfese et al., 2006). The reliance of students on phonological awareness skills often declines as their cognition develops, and proficient readers use their memory rather than the assistance of phonological awareness skills to decode written words.
Phonological awareness includes ability to process letter sounds, rhyming words, and segmenting letters within words (Molfese et al., 2006). Phonological awareness is a key cognitive function in learning how to read. Students use phonological awareness skills to process pseudo words or non-words, and they provide the rules and sounds of letters to sound out these words. Phonological awareness skills are often used for initially processing letters into words that are coded into memory for future use in reading fluency and reading comprehension. Students’ level of phonological awareness is often used as a predictor for later reading skills. High phonological awareness skills frequently void the effects of lower socioeconomic status (Nobel, Farah, & McCandliss, 2006). Low phonological awareness can also lead to diagnoses of developmental phonological dyslexia.
References
Leppänen, U., Aunola, K., Niemi, P., & Nurmi, J. (2008). Letter knowledge predicts grade 4 reading fluency and reading comprehension. Learning and Instruction, 18, 548-564.
Molfese, V., Modglin, A., Beswick, J., Neamon, J., Berg, S., Berg, C., & Mohar, A. (2006). Letter knowledge, phonological processing, and print knowledge: Skill development in nonreading preschool children. Journal of Learning Disabilities, 39(4), 296-305.
Noble, K., Farah, M. & McCandliss, B. (2006). Socioeconomic background modulates cognition-achievement relationships in reading. Cognitive Development, 21(3), 349-368.
Peterson, R., Pennington, B., Shriberg, L, & Boada, R. (2009). What influences literacy outcome in children with speech sound disorder? Journal of Speech, Language, and Hearing Research, 52, 1175-1188.
Thompson, G. (2009). The long learning route to abstract letter units. Cognitive Neuropsychology, 26(1), 50-69.
Vaessen, A, & Blomert, L. (2009). Long-term cognitive dynamics of fluent reading development. Journal of Experimental Child Psychology, 105, 213-231.
