Task-Induced Mental Fatigue and Motivation Influence Listening Effort as Measured by the Pupil Dilation in a Speech-in-Noise Task

Objectives: Listening effort and fatigue are common complaints among individuals with hearing impairment (HI); however, the underlying mechanisms, and relationships between listening effort and fatigue are not well understood. Recent quantitative research suggests that the peak pupil dilation (PPD), which is commonly measured concurrent to the performance of a speech-in-noise task as an index of listening effort, may be informative of daily-life fatigue, but it remains unknown whether the same is true for task-induce fatigue. As fatigue effects are known to manifest differently depending on motivation, the main aim of the present study was to experimentally investigate the interactive effects of task-induced fatigue and motivation on the PPD. Design: In a pre-/post- fatigue within-subject design, 18 participants with normal hearing (NH) engaged in a 98-trial-long speech-in-noise task (i.e., a load sequence, approximately 40 min. long), which either excluded or included additional memory demands (light vs. heavy load sequence). Before and after the load sequence, baseline pupil diameter (BPD) and PPD were measured during shorter probe blocks of speech-in-noise tasks. In these probe blocks, if participants correctly repeated more than 60% of the keywords, they could win vouchers of either 20 or 160 Danish krones worth (low incentive vs. high incentive). After each probe block, participants reported their invested effort, tendency for quitting, and perceived performance. Results: The BPD in anticipation of listening declined from pre- to post-load sequence, suggesting an overall decrease in arousal, but the decline did not scale with the magnitude of the load sequence, nor with the amount of monetary incentive. Overall, there was larger pre- to post-load sequence decline in PPD when the load sequence was heavy and when the monetary incentives were low. Post-hoc analyses showed that the decline in PPD was only significant in the heavy-load sequence-low reward condition. The speech-in-noise task performance, self-reported effort, and self-reported tendency to quit listening did not change with the experimental conditions. Conclusions This is the first study to investigate the influence of task-induced fatigue on BPD and PPD. Whereas BPD was not sensitive to the magnitude of previous load sequence and monetary incentives, the decline in PPD from pre- to post- load sequence was significant after the heavy load sequence when the offered monetary incentives were low. This result supports the understanding that fatigue and motivation interactively influence listening effort.

The Role of Incentives in Deciding to Receive the Available COVID-19 Vaccine in Israel

This study aimed to assess the Israeli public’s intention to get vaccinated immediately after the COVID-19 vaccine became available, and to determine the role of incentives beyond socio-demographic, health-related and behavioral factors, in predicting this intention. An online survey was conducted among adults in Israel (n = 461), immediately after the first COVID-19 vaccine became available (22 December 2020 to 10 January 2021). Two regressions were performed to investigate determinants of intention to receive the available COVID-19 vaccine and sense of urgency to receive the vaccine. Although many adults were willing to receive available COVID-19 vaccine, only 65% were willing to immediately receive the vaccine, 17% preferred to wait 3 months and 18% preferred to wait a year. The sense of urgency to get vaccinated differed by age, periphery level, perceived barriers, cues to action and availability. Incentives such as monetary rewards or the green pass did not increase the probability of getting vaccination immediately. Providing data on the role of incentives in increasing the intention to immediately receive the available COVID-19 vaccine is important for health policy makers and healthcare providers. Our findings underscore the importance of COVID-19 vaccine accessibility. Health policy makers should consider allocating funds for making the vaccine accessible and encourage methods of persuasion, instead of investing funds in monetary incentives.

Enhancing Participation in Probability-Based Online Panels: Two Incentive Experiments and Their Effects on Response and Panel Recruitment

This article investigates how mail-based online panel recruitment can be facilitated through incentives. The analysis relies on two incentive experiments and their effects on panel recruitment, and the intermediate participation in the recruitment survey. The experiments were implemented in the context of the German Emigration and Remigration Panel Study and encompass two samples of randomly sampled persons. Tested incentives include a conditional lottery, conditional monetary incentives, and the combination of unconditional money-in-hand with conditional monetary incentives. For an encompassing evaluation of the link between incentives and panel recruitment, the article further assesses the incentives’ implications for demographic composition and panel recruitment unit costs. Multivariate analysis indicates that low combined incentives (€5/€5) or, where unconditional disbursement is unfeasible, high conditional incentives (€20) are most effective in enhancing panel participation. In terms of demographic bias, low combined incentives (€5/€5) and €10 conditional incentives are the favored options. The budget options from the perspective of panel recruitment include the lottery and the €10 conditional incentive which break-even at net sample sizes of 1000.

How Effective Are Monetary Incentives to Vote? Evidence from a Nationwide Policy

We study voters’ response to marginal changes to the fine for electoral abstention in Peru, leveraging variation from a nationwide reform. A smaller fine has a robust, negative effect on voter turnout, partly through irregular changes in voter registration. However, representation is largely unaffected, as most of the lost votes are blank or invalid. We also show that the effect of an exemption from compulsory voting is substantially larger than that of a full fine reduction, suggesting that nonmonetary incentives are the main drivers behind the effectiveness of compulsory voting. (JEL D72, K16, O17)

Monetary incentives and fiscal policy mutual influence

The article considers the problems and practice of using the tools of monetary and fiscal stimulation of the economy. The main problems of the application of monetary instruments in practice in emerging markets are identified. The author paid special attention to the definition of classical monetary policy instruments and their role in economic growth in emerging markets. Critical assessment of the role of monetary policy instruments in stimulating economic growth is based on the practice of central banks in emerging markets. Recommendations for the analysis of the efficiency of monetary transmission are given. Problems of efficiency of application of fiscal stimulus instruments in emerging markets are raised. The mechanisms of the dependence between fiscal and monetary policies and the strengthening of such dependence in the case of a significant informal sector of the economy and an underdeveloped financial market are demonstrated. The author not only points out the need for coordination in choosing between monetary and fiscal policy but also advocates the idea of having an independent arbitrator between monetary and fiscal authorities in developing countries. The article also focuses on the analyzing algorithm of the use of monetary policy instruments for economic growth effectiveness. The conclusions made in the article will be especially useful for those who are interested in the issue of optimal choice between monetary and fiscal instruments to stimulate economic development in emerging markets.

Through the rhetoric art: CEO incentives in sustainability sensitive industries

Purpose This paper aims to explore the relationship between the readability of sustainability reports and chief executive officer (CEO) attributes, comprising monetary, non-monetary incentives and personal characteristics. Design/methodology/approach The study is based on an international sample of companies operating in sustainability-sensitive industries during 2016–2018. Findings The results prove that CEO monetary incentives, as well as CEO non-monetary incentives, negatively influence the readability of sustainability reports, revealed in a positive relationship with readability indexes, by providing reports with greater reading difficulty. Additionally, this study shows evidence about the relation of complementarity between these incentives. Other CEO characteristics have no significant effect on the readability of sustainability reports. Originality/value This research sheds the light on the role of CEO incentives in obfuscating sustainability information to portray the company, operating in sustainability-sensitive industries, in a favorable image.

A study of incentives in charitable fundraising

Purpose The purpose of this study is to determine how self-driven (intrinsic motivators) and monetary incentives (extrinsic motivators) are mediated by an effort to affect fundraising outcomes. This integration sheds light on crowding out between the two types of incentives as well the drivers of fundraising outcomes, specifically effort and donations. Design/methodology/approach A field experiment is conducted over a two-month period, involving an online fundraising campaign with over 300 volunteers assigned to one of five different incentive conditions. A special website was created to monitor fundraiser efforts. Fundraisers filled out pre- and post-study surveys. Findings While high monetary incentives result in the greatest immediate increase in funds raised, they crowd out future intentions to volunteer once incentives are withdrawn. Mediation analyzes show that fundraiser effort fully mediates the effect of intrinsic motivators and partially mediates the direct effect of extrinsic motivators on funds raised. Research limitations/implications A major limitation of field experiments is the lack of control, resulting in higher variation. However, while a more controlled experiment will reduce this variation, this goes at the expense of lower external validity. Practical implications Results indicate that – at least in the short run – monetary incentives can result in higher fundraising outcomes. However, this goes at the expense of a reduction in future volunteering once the incentives are withdrawn. Originality/value This study examines whether extrinsic or intrinsic motivators have a greater impact on funds raised and whether extrinsic motivators crowd out future intentions to volunteer. Different from previous research in which effort is a latent variable, the effort is directly observed over time.

Monetary incentives do not reduce the repetition-induced truth effect

People rate and judge repeated information more true than novel information. This truth-by-repetition effect is of relevance for explaining belief in fake news, conspiracy theories, or misinformation effects. To ascertain whether increased motivation could reduce this effect, we tested the influence of monetary incentives on participants’ truth judgments. We used a standard truth paradigm, consisting of a presentation and judgment phase with factually true and false information, and incentivized every truth judgment. Monetary incentives may influence truth judgments in two ways. First, participants may rely more on relevant knowledge, leading to better discrimination between true and false statements. Second, participants may rely less on repetition, leading to a lower bias to respond “true.” We tested these predictions in a preregistered and high-powered experiment. However, incentives did not influence the percentage of “true” judgments or correct responses in general, despite participants’ longer response times in the incentivized conditions and evidence for knowledge about the statements. Our findings show that even monetary consequences do not protect against the truth-by-repetition effect, further substantiating its robustness and relevance and highlighting its potential hazardous effects when used in purposeful misinformation.