听流行音乐为什么让人愉悦?
<p><span word="Have">Have</span> <span word="you">you</span> <span word="ever">ever</span> <span word="wondered">wondered</span> <span word="why">why</span> <span word="certain">certain</span> <span word="pop">pop</span> <span word="songs">songs</span> <span word="just">just</span> <span word="make">make</span> <span word="you">you</span> <span word="feel">feel</span> <span word="so">so</span> <span word="good">good</span>?</p><p>你可曾好奇过为什么某些流行歌曲会让你感觉这么愉快？</p><p><span word="Researchers">Researchers</span> <span word="studying">studying</span> <span word="the">the</span> <span word="question">question</span> <span word="found">found</span> <span word="that">that</span> <span word="the">the</span> <span word="right">right</span> <span word="combination">combination</span> <span word="of">of</span> <span word="uncertainty">uncertainty</span> <span word="and">and</span> <span word="surprise">surprise</span> <span word="is">is</span> <span word="what">what</span> <span word="gives">gives</span> <span word="listeners">listeners</span> <span word="the">the</span> <span word="most">most</span> <span word="pleasure">pleasure</span>.</p><p>研究人员发现，恰到好处地融合不确定和惊奇因素是让倾听者感到愉悦的原因。</p><p><span word="The">The</span> <span word="study">study</span>, <span word="published">published</span> <span word="in">in</span> <span word="the">the</span> <span word="journal">journal</span> <span word="Current">Current</span> <span word="Biology">Biology</span>, <span word="involved">involved</span> <span word="an">an</span> <span word="analysis">analysis</span> <span word="of">of</span> 80,000 <span word="chords">chords</span> <span word="in">in</span> 745 <span word="pop">pop</span> <span word="songs">songs</span> <span word="from">from</span> <span word="the">the</span> <span word="US">US</span> <span word="Billboard">Billboard</span> "<span word="Hot">Hot</span> 100" <span word="chart">chart</span> <span word="between">between</span> 1958 <span word="and">and</span> 1991.</p><p>发表在《当代生物学》期刊上的这项研究分析了1958年到1991年间美国公告牌百强单曲榜上的745首流行歌曲中的8万组和弦。</p><p><span word="The">The</span> <span word="researchers">researchers</span> -- <span word="from">from</span> <span word="institutes">institutes</span> <span word="in">in</span> <span word="Germany">Germany</span>, <span word="Norway">Norway</span>, <span word="Denmark">Denmark</span> <span word="and">and</span> <span word="the">the</span> <span word="UK">UK</span> -- <span word="used">used</span> <span word="a">a</span> <span word="machine">machine</span>-<span word="learning">learning</span> <span word="model">model</span> <span word="to">to</span> <span word="quantify">quantify</span> <span word="the">the</span> <span word="level">level</span> <span word="of">of</span> <span word="uncertainty">uncertainty</span> <span word="and">and</span> <span word="surprise">surprise</span> <span word="of">of</span> <span word="these">these</span> <span word="chords">chords</span>, <span word="and">and</span> <span word="then">then</span> <span word="asked">asked</span> 39 <span word="adult">adult</span> <span word="volunteers">volunteers</span> <span word="to">to</span> <span word="rate">rate</span> <span word="how">how</span> <span word="pleasurable">pleasurable</span> <span word="they">they</span> <span word="found">found</span> <span word="each">each</span> <span word="series">series</span> <span word="of">of</span> <span word="chords">chords</span>.</p><p>来自德国、挪威、丹麦和英国科研机构的研究人员用一种机器学习模型把这些和弦中的不确定和惊奇因素量化了，并请39名成年志愿者给每组和弦带来的愉悦程度打分。</p>
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