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2012-10-28 Sun

#1280. ѥɽ [corpus][representativeness][variety][idiolect][methodology]

ѥˤȤäɽ (representativeness) ̿Ǥ뤳Ȥϡѥ ([2010-11-16-1]) 餫Ǥ뤷ε#1279. BNC ζߤȼߡ ([2012-10-28-1]) ǾҲ𤷤 Leech Ȥ櫓ĥƤǤ롥McEnery et al. (13) ϡɽˤĤơLeech 򻲹ͤˤʤ "a corpus is thought to be representative of the language variety it is supposed to represent if the findings based on its contents can be generalized to the said language variety" ȽҤ٤Ƥ롥
ɽŪ˹ͤƤߤ褦㤨 BNC åȤȤ褦ʡ奤ꥹѸȤŪѼϿ륳ѥ (general corpus) ɽϤɤΤ褦ˤΤ񤷤äդȽ񤭸դγͤȡ줾50%Ĥ˳꿶뤳Ȥϡ奤ꥹѸɽ«ƤLeech ɽǤ "impressionistic" Ȥʤ餶ʤνִ֤˹ԤʤƤ븽奤ꥹѸΰŪʬäդˤƤǤϤʤ⤷ȤСäեѥγ㤨80%ۤɤꤹۤɽݤǤΤǤϤʤΤȤʤ븽奤ꥹѸľܤĤळȤǤʤʾ塤ɽεϹԤͤޤäƤޤ
ѥä˰̥ѥˤɽȤˡ balance sampling Ȥ2Ĥγǰʬƹͤ뤳Ȥ롥McEnery et al. (13) Ǥϡ"the representativeness of most corpora is to a great extent determined by two factors: the range of genres included in a corpus (i.e. balance . . .) and how the text chunks for each genre are selected (i.e. sampling . . .)" Ƥ롥
balance ȤϡBNC ѸǤȤ domain genre Ȥʬ˴ؤΤǤ롥㤨С奤ꥹѸΥѥɸ֤ʤ⡤ꥹοʹαѸ򽸤᤿ѥϡrepresentativeness 񤬤롥奤ꥹѸˤϽ񤭸դǤʤäդ⤢뤷ԤˤĤƤϿʹѸǤʤʸرѸ⤢Żҥ᡼Ѹ⤢뤷㤤ʪѸ⤢СѸ⤢롥Τ domain genre θ줿Ȼפ̤ƤĤ text domain ΤʹѸ˸¤äƤ⡤֥ɤ⤢й⤢롥1ĤοʹǤ⡤Ҳ̡ݡ̡ʤɤ̤ɬפϤʤΤҲ̤Ǥй⵭ȹݵζ̤ϤɤŪˤϤɤޤǤʬ롥äդǤƱͤ˺ʬ䤷ʤƤСĿ͸ (idiolect) ˸Ŀ͸ˤ register ̤θ졤ʤɤΥȥؤȽ夷ƤޤºݤΥѥϡQŪʥ٥Ŷ뤳Ȥˤʤ뤬־QŪפ "impressionistic" ϤۤƱ
sampling Ȥɽ뤿μˡǤ롥ΤθŪħƸ褦ˡ̤ˤƹθäʤ顤ѥ˳ domain ۤ뤿ȼǤ롥ˤϡsampling unit ȤƲꤹ뤫ŵŪˤϡܡʹʤɤʤȤƤñ̡ˡΤ褦ñ̤ꥹȲȤϰ (sampling frame) ɤޤǤꤹ뤫ǯؤθ䡤٥ȥ顼ܤؤθʤɡˡɸܼϴʥˤ뤫٤ηϲäǤΥˤ뤫ɤۤ뤫ʤɤΡŪŪ꤬ޤޤ롥
ɽ˴ؤ⤦1ĤγǰȤơclosure 뤤 saturation ȸƤФΤ⤢롥McEnery et al. (16) ˤС"Closure/saturation for a particular linguistic feature (e.g. size of lexicon) of a variety of language (e.g. computer manuals) means that the feature appears to be finite or is subject to very limited variation beyond a certain point." Ƥ롥ʿСʾ女ѥεϤ礭Ƥ⡤ùγѤʤȤϤãСΥѥ saturated Ǥȹͤ롥ɽλɸȤƤϡbalance saturation ΤۤƤȤŦ⤢뤬saturation ϼȤƸäǰƬˤꡤ¾θܤؤαѤϻߤƤʤΤǤ롥
ɽϡ女ѥ̿ǤȤϤäƤ⡤ԤȤ餤Ϥ롥ݤ뤿ʤˡʤ٤ƤΥѥԻԤΩϤƬˤѥϼԻƤ롥Ṳ̄ˤơҤԻȻѤ³Ƥ椭Υϥ򤿤٤ʳˤΤ⤷ʤ

McEnery, Tony, Richard Xiao, and Yukio Tono. Corpus-Based Language Studies: An Advanced Resource Book. London: Routledge, 2006.

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