Adult numeracy is underresearched especially regarding numeracy practices. Research shows general correlations between numeracy skills and the use of these skills, indicating that low proficient groups use their skills less often than others do. Earlier research also shows correlations of low numeracy skills and practices with low income. Both results feed stereotypes that vulnerable subgroups—with low numeracy proficiency or a low monthly budget—would not calculate much and this would even cause their complicated income situation. Findings of this article show that the tighter the budget is the more likely vulnerable subgroups are to monitor it by frequent calculations of prices, costs, or budgets. This article connects representative Programme for the International Assessment of Adult Competencies data from the German data set with a local sample of people with lowest income. Findings show that vulnerable subgroups calculate more often than other parts of the population, but they mostly do without technical devices.

中文翻译：

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弱势群体和算术实践：贫困，债务和失业与日常算术实践如何相关

成人算术研究不足，尤其是在算术实践方面。研究表明，算术技能与这些技能的使用之间具有普遍的相关性，这表明熟练程度较低的人群使用其技能的频率低于其他人群。较早的研究还显示了低计算能力和实践与低收入之间的相关性。两种结果都得出了刻板印象，即弱势的子群-计算能力低或每月预算低-不会计算太多，这甚至会导致其复杂的收入状况。本文的发现表明，预算越紧，脆弱的子群体越可能通过频繁地计算价格，成本或预算来监视预算。本文将来自德国数据集的代表性国际成人能力评估计划与本地最低收入人群联系起来。研究结果表明，易受伤害的亚人群比其他人群的计算频率更高，但他们大多没有技术手段。