The present study addresses the main contention of the Noticing Hypothesis that conscious attention is necessary for successful learning. Arguments are given against the strong version of the hypothesis, under which one cannot acquire new language forms without conscious attention. Foreign learners were tested on their familiarity with formulaic expressions especially selected for their low salience. Additionally, the expressions used were tested for the likelihood of attracting attention. The results suggest that despite their inconspicuousness, such expressions are part of learners' lexical representations. Students' performance was found to correlate with usage patterns found in the input, a strong indication that their lexical representations are shaped by numerous encounters with specific uses of these expressions. It is argued that conscious attention is unlikely in even most, let alone all encounters. While the importance of awareness is not debated here, this study questions conscious attention as a default condition for learning.
- MeSH
- jazyk (prostředek komunikace) * MeSH
- lidé MeSH
- mladý dospělý MeSH
- pozornost * fyziologie MeSH
- rozpoznávání (psychologie) fyziologie MeSH
- učení fyziologie MeSH
- uvědomování si fyziologie MeSH
- Check Tag
- lidé MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
Prezygotic interspecific crossability barrier in the genus Cucumis is related to the ploidy level of the species (cucumber (C. sativus), x = 7; muskmelon (C. melo) and wild Cucumis species, x = 12). Polyploidization of maternal plants helps hybridization among other Cucumis species by overcoming prezygotic genetic barriers. The main objective of this paper is to compare the results of several methods supporting interspecific crosses in cucumber without and with polyploidization (comparison between diploid (2x) and mixoploid (2x/4x) cucumber maternal plants). Mixoploid plants were obtained after in vivo and in vitro polyploidization by colchicine and oryzalin. Ploidy level was estimated by flow cytometry. Embryo rescue, in vitro pollination, and isolation of mesophyll protoplast were tested and compared. Positive effect of polyploidization was observed during all experiments presented by higher regeneration capacity of cultivated mixoploid cucumber embryos, ovules, and protoplasts. Nevertheless, the hybrid character of putative hybrid accessions obtained after cross in vivo and in vitro pollination was not confirmed.
