Peck D F
Area Clinical Psychology Service (Highland Health Board), Craig Phadrig Hospital, Inverness, U.K.
J Affect Disord. 1990 Dec;20(4):249-50. doi: 10.1016/0165-0327(90)90056-e.
Differencing and cross-correlations are useful and straightforward methods for dealing with relationships between variables measured over short periods of time. Without such transformations of time-series data, spurious relationships may emerge and the true nature of underlying relationships may be obscured. This reanalysis of data from Carney et al. (1989) suggests that there is a strong relationship between amount of sunshine in a month and admissions for mania one month later.
差分和互相关是处理短期内测量的变量之间关系的有用且直接的方法。如果不对时间序列数据进行此类变换，可能会出现虚假关系，并且潜在关系的真实性质可能会被掩盖。对卡尼等人（1989年）数据的重新分析表明，一个月的日照量与一个月后躁狂症的入院人数之间存在很强的关系。
