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英文の翻訳お願いしますm(_ _)m

Peterson and peterson(1959)studied the duration of short-term memory by using the task of remembering a three-letter stimulus while counting backwards by threes.The ability to remember the three letters in the correct order reduced to only about 50% after 6 seconds and forgetting was almost complete after 18 seconds(see the figure on the left). What is the most convincing evidence that short-term and long-term memory are distinct?Surprisingly,the strongest evidence comes from brain-damaged patients!Suppose there was only one memory system dealing with short-term and long-term memory.If that one and only memory system were damaged,performance would be impaired on all memory tasks regardless of wherther they involved short-term or long-term memory.In contrast,suppose there are separate short-term and long-term memory systems located in different parts of the brain.It follows that some brain-damaged patients should have impaired long-term memory but intact short-term memory,whereas others should have impaired short-term memory but intact long-term memory.If such finding were obtained,they would from a double dissociation(i.e.,some patients perform normally on task A but poorly on task B,whereas others perform normally on task B but poorly on task A).

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ピーターソン&ピーターソン(1959)は、3文字ずつ逆さまに言いながら、3文字の刺激を覚える課題を使用することによって、短期記憶の持続時間を研究しました。 正しい順序で3つの文字を思い出す能力は6秒後には、わずか約50%にまで減少しました(左の図を参照してください)。 短期記憶と長期記憶が異なっているという最も納得のいく証拠は、何でしょう? 驚くべきことに、最も強力な証拠は、脳に損傷を受けた患者からのものです! 短期記憶と長期記憶に対処する記憶系統が一つしかないと思ってください。 その唯一の記憶系統が損傷を受けるならば、記憶作業が短期記憶に関わったか長期記憶に関わったかを問わず、能力はすべての記憶作業に関して損なわれるでしょう。 対照的に、脳の異なった部分に別々の短期記憶と長期記憶の系統が位置していると仮定してください。 脳に損傷を受けた患者の中には、長期記憶は損なわれたが、短期記憶は無傷のはずだと言う者もいれば、他方、短期記憶は損なわれたが、長期記憶は無傷のはずだという患者もいると言うことになります。 そのような調査結果を得るなら、彼らは二重乖離を形成するでしょう(すなわち、課題Aは正常に行えるのに、課題Bはうまくできない患者がいたり、他方、課題Bは正常に行えるのに、課題Aはうまくできない患者がいたりすると言うことになります)。 ☆ 分割して再質問された、英文に回答したものです。この質問が出された時から、訳してみようとしたのですが、特に出だしの、count backwards の訳出に迷って、残念していました。count backwards from ten で、「10から1まで数える」と言う意味ですから、文字だと、その文字を「逆に言っていく」事になると思います。例えば、backwards を、sdr, awk, cab と「3文字ずつ」言ってゆくのだと思います。ざっと目を通した時も、そこ以外は、だいたい読み取れていましたので、全訳してみました。分割した英文に付けた訳も少し変更しました。

参考URL:
http://eow.alc.co.jp/count+backwards/UTF-8/

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