In this article we introduce the notion of n-capable groups. It is shown that every group G admits a uniquely determined subgroup (〖Z^n)〗^* (G) which is a characteristic subgroup and lies in the n-centre subgroup of the group G. This is the smallest subgroup of G whose factor group is n-capable. Moreover, some properties of n-central extension will be studied.

the present research investigated the effect of self-regulatory approach (with two components of self-checking and self-efficacy) on pre-intermediate iranian learners' lexical segmentation in listening comprehension via authentic listening comprehension texts. to achieve this purpose, the investigators administered an oxford placement test (2007) to ninety-eight students of two girls’ priv...

the purpose of the study was to activate the passive lexical knowledge through noticing and to investigate the effect of sentence writing as the post task of noticing activity on strengthening the effect of noticing. forty-two iranian female adult upper-intermediate english students of a state university in 2 homogenous groups participated in noticing the lexical items whose production were not...

Up to two centuries ago patients were lucky to survive even minor surgical interventions without contracting life-endangering infections, and having to endure extreme distress. Such advances highlighted the importance of clean dressing and sterility. Lint, gauze and cotton rapidly replaced older types of dressings. Almost a century later another major advance occurred when Winter defined the ph...

Up to two centuries ago patients were lucky to survive even minor surgical interventions without contracting life-endangering infections, and having to endure extreme distress. Such advances highlighted the importance of clean dressing and sterility. Lint, gauze and cotton rapidly replaced older types of dressings. Almost a century later another major advance occurred when Winter defined the ph...

Orthographically/phonologically related primes have typically been found to facilitate processing of target words. This phenomenon is usually explained in terms of spreading activation between nodes for orthographically/phonologically similar words in lexical memory. The phenomenon was explored in a series of studies involving the manipulations of prime and target type (word or picture) and pri...

This study investigates how cohesion manifests in readers’ thought processes while reading texts when they are instructed to engage in self-explanation, a strategy associated with deeper, more successful comprehension. In Study 1, college students (n = 21) were instructed to either paraphrase or self-explain science texts. Paraphrasing was characterized by greater cohesion in terms of lexical o...

The question of when and how bottom-up input is integrated with top-down knowledge has been debated extensively within cognition and perception, and particularly within language processing. A long running debate about the architecture of the spoken-word recognition system has centered on the locus of lexical effects on phonemic processing: does lexical knowledge influence phoneme perception thr...