An analysis of reinforcement history effects

Four pigeons were exposed to two tandem variable-interval differential-reinforcement-of-low-rate schedules under different stimulus conditions. The values of the tandem schedules were adjusted so that reinforcement rates in one stimulus condition were higher than those in the other, even though response rates in the two conditions were nearly identical. Following this, a fixed-interval schedule of either shorter or longer values than, or equal to the baseline schedule, was introduced in the two stimulus conditions respectively. Response rates during those fixed-interval schedules typically were higher in the presence of the stimuli previously correlated with the lower reinforcement rates than were those in the presence of the stimuli previously correlated with the higher reinforcement rates. Such effects of the reinforcement history were most prominent when the value of the fixed-interval schedule was shorter. The results are consistent with both incentive contrast and response strength conceptualizations of related effects. They also suggest methods for disentangling the effects of reinforcement rate on subsequent responding, from the response rate with which it is confounded in many conventional schedules of reinforcement.     

Economics, ecologics, and mechanics: The dynamics of responding under conditions of varying motivation

The mechanics of behavior developed by Killeen (1994) is extended to deal with deprivation and satiation and with recovery of arousal at the beginning of sessions. The extended theory is validated against satiation curves and within-session changes in response rates. Anomalies, such as (a) the positive correlation between magnitude of an incentive and response rates in some contexts and a negative correlation in other contexts and (b) the greater prominence of incentive effects when magnitude is varied within the session rather than between sessions, are explained in terms of the basic interplay of drive and incentive motivation. The models are applied to data from closed economies in which changes of satiation levels play a key role in determining the changes in behavior. Relaxation of various assumptions leads to closed-form models for response rates and demand functions in these contexts, ones that show reasonable accord with the data and reinforce arguments for unit price as a controlling variable. The central role of deprivation level in this treatment distinguishes it from economic models. It is argued that traditional experiments should be redesigned to reveal basic principles, that ecologic experiments should be redesigned to test the applicability of those principles in more natural contexts, and that behavioral economics should consist of the applications of these principles to economic contexts, not the adoption of economic models as alternatives to behavioral analysis.     

A behavioral economic analysis of concurrently available money and cigarettes.

In economic terms, consumption of a reinforcer is determined by its price and the availability and price of other reinforcers. This study examined the effects of response-requirement (i.e., price) manipulations on the self-administration of two concurrently available reinforcers. Six cigarette smokers participated in 4-hr sessions in which money and puffs on a cigarette were concurrently available according to fixed-ratio schedules of reinforcement. Once stable responding was obtained with both reinforcers available at Fixed Ratio 100, the response requirement for one reinforcer was systematically varied (Fixed Ratio 1,000 and 2,500), while the other reinforcer remained scheduled at Fixed Ratio 100. Increasing the fixed-ratio size for a reinforcer decreased its consumption, with a greater decrease occurring for monetary reinforcement. This finding was quantified in economic terms as own-price elasticity, with elasticity coefficients greater for money than cigarettes. The effects of fixed-ratio size on response output also differed across the two reinforcers. Although greater responding occurred for money at Fixed Ratio 100, increases in fixed-ratio size (for money) decreased responding for money, whereas the same increase in fixed-ratio size (for puffs) increased responding for puffs. Finally, increasing the fixed-ratio size for one reinforcer had little effect on consumption of the other concurrently available reinforcer. This finding was quantified as cross-price elasticity, with elasticity coefficients near 0.0 for most subjects, indicating little or no reinforcer interaction. The results indicate that the reinforcing effects of cigarettes and money in the setting studied here differed, and that the effects produced by changing the price of one reinforcer did not interact with the consumption of the other concurrently available reinforcer.     

Distributive justice in marriage: Equality or equity?

Experimental studies of distributive justice suggest that men prefer an equity rule for allocating rewards, whereas women prefer equality. These differences are likely to carry implications for distributive justice in the context of marriage. There is a popular view in Western societies that marriage should be regarded as a partnership of equals, and this is also an implicit assumption in microeconomic accounts of the family. However, inequality between spouses is still commonplace, with the husband more likely to have overall financial control and greater access to money for personal spending (PSM). This paper investigates the issue of sharing in marriage, with particular reference to PSM, using data from an in-depth interview study supplemented by some follow-up questionnaires. The participants were 13 women and nine of their partners, mainly ‘middle class’ and aged between 30 and 50. After classifying each couple's system of financial management, the paper focuses upon eight couples with a philosophy of sharing. The findings show that, despite attempts to equalize outcomes for both partners, a sense of ‘ownership’ associated with having earned the money seemed to render it more salient than other, non-financial contributions to the marriage. As a result, patterns of control and personal spending appeared to be based upon equity rather than equality.     

BEHAVIORAL COMMUNITY PSYCHOLOGY: ENCOURAGING LOW-INCOME PARENTS TO SEEK DENTAL CARE FOR THEIR CHILDREN1

The present study examined the effectiveness and cost efficiency of three different techniques to encourage low-income rural parents to seek dental care for their children. The families of 51 children who needed immediate dental care (determined by dental screening at a local school) were placed into three matched groups and randomly assigned to the treatment conditions: One Prompt (Note Only), Three Prompt (Note, Telephone Contact, Home Visit), and One Prompt plus $5 Incentive. The Three Prompt and One Prompt plus $5 Incentive were significantly more effective in initiating dental visits than the Note-Only procedure. Not only was the One Prompt plus $5 Incentive technique effective in producing a slightly larger percentage of initial dental visits compared to the Three-Prompt technique, it also produced a significantly larger number of followup visits. Furthermore, the cost-effectiveness analysis showed the Incentive condition to be less costly than the Three-Prompt condition in encouraging initial dental visits.     

An unintended consequence of social distance regulations: COVID-19 social distancing promotes the desire for money

Social distance regulations have been widely adopted during the global COVID-19 pandemic. From an evolutionary perspective, social connection and money are interchangeable subsistence resources for human survival. The substitutability principle of human motivation posits that scarcity in one domain (e.g., social connection) could motivate people to acquire or maintain resources in another domain (e.g., money). Two experiments were conducted to test the possibility that COVID-19 social distancing enhances the desire for money. Results showed that compared with controls, participants receiving social distancing primes (via recollection of experiences of social distancing or a Chinese glossary-search task) offered less money in the dictator game, showed lower willingness towards charitable donation (Experiment 1; N = 102), donated less money to a student fund, and rated money as having more importance (Experiment 2; N = 140). Our findings have far-reaching implications for financial decisions, charitable donations, and prosociality during and after the COVID-19 pandemic.     

Reward Influence on the Heart: Cardiovascular Response as a Function of Incentive Value at Five Levels of Task Demand

This study examined cardiovascular effects of incentive value in men and women confronted with cognitive challenges that were more and less difficult to meet. Participants performed computer memory tasks varying in difficulty from low to high, with instructions that they could earn chances toward a $100 prize or $10 prize by attaining a 90% success rate. Analysis of cardiovascular responses assessed during work revealed an interaction between difficulty and incentive value for heart rate. Participants' heart rate responses were proportional to task difficulty and unaffected by incentive value in all conditions except for the most difficult one. Where difficulty was greatest, $100 participants showed relatively high heart rate responsiveness, whereas $10 participants showed low heart rate responsiveness. This heart rate finding corroborates and extends cardiovascular results from previous experiments, and lends further support to the view that cardiovascular responses will be proportional to incentive value only under some task conditions.     

金钱激励在社会排斥影响不确定性决策中的调节作用

研究从金钱补偿的视角考察社会排斥对不确定性决策的影响以及金钱激励的调节作用。实验发现,有金钱激励时,被排斥者在爱荷华赌博任务(Iowa gambling task,IGT)中的行为分数(组块2和3的选牌净分数和总的盈利分数)显著高于社会接纳者,表现为风险规避; 在无金钱激励时,被排斥者在IGT任务中的行为分数(组块4和5的选牌净分数和总的盈利分数)显著低于被接纳者,表现为风险寻求。实验结果表明社会排斥对不确定性决策的影响受到金钱激励的调制。     

奖赏预期对面孔情绪加工的影响：一项事件相关电位研究

采用事件相关电位(ERPs)技术考察了奖赏预期对人类面孔情绪识别的影响。实验采用线索-目标范式, 分别记录了被试在奖赏预期条件下以及无奖赏预期条件下对正性、中性和负性面孔进行情绪辨别任务的ERP数据。行为结果显示, 被试在奖赏预期条件下的反应时快于无奖赏预期条件下的反应时, 对情绪面孔的反应时快于对中性面孔的反应时。ERPs数据显示, 奖赏线索比无奖赏线索诱发了更正的P1、P2和P300成分。目标刺激诱发的P1、N170波幅以及N300均受到奖赏预期的调节, 在奖赏预期条件下目标诱发了更正的ERPs。P1、N170、VPP等成分没有受到面孔情绪的影响, 而额中央位置的N300波幅显示情绪(正性与负性)面孔与中性面孔加工的差异。重要的是, N300波幅出现奖赏预期与情绪的交互作用, 正、负情绪加工效应以及负性偏向效应受奖赏预期的差异性影响。正性情绪加工效应不受奖赏预期的影响, 而负性情绪加工效应和负性偏向效应在奖赏预期条件下显著大于无奖赏预期条件下。这些结果说明, 奖赏预期能够调节对面孔情绪的加工, 且不同加工进程中奖赏对情绪加工的调节作用不同。动机性信息调节注意资源的分配, 促进了个体在加工面孔情绪时的负性偏向。     

金钱概念启动对亲社会行为的影响及其决策机制

金钱是一种重要的资源, 也是人们日常生活中非常熟悉的概念。国内外有关实证研究发现, 启动金钱概念会诱发自足感、经济型心理定势、自由市场的价值观以及利己自我图式(社会认知模型), 从而导致亲社会行为减少。文章探讨了金钱概念启动对利他性亲社会行为、遵规与公益性亲社会行为、关系性亲社会行为和特质性亲社会行为的影响。未来的研究应该进一步关注：(1)金钱概念启动在组织管理中的研究; (2)贫富差异在金钱概念启动与亲社会行为关系中的调节效应; (3)深化时间概念启动影响亲社会行为的研究; (4)金钱概念启动影响亲社会行为的神经机制研究。