Delay and probability discounting as candidate markers for dementia: an initial investigation.

نویسندگان

  • Cutter A Lindbergh
  • Antonio N Puente
  • Joshua C Gray
  • James Mackillop
  • L Stephen Miller
چکیده

The present study investigated delay discounting and probability discounting-behavioral economic indices of impulsivity and risk proneness, respectively-in 39 healthy older adults and 25 older adults with mild cognitive impairment (MCI). Relative to the healthy group, it was hypothesized that older adults with MCI would display greater levels of impulsivity, risk proneness, and response inconsistency. The MCI group was found to display a unique delay discounting profile characterized by increasing impulsivity with decreasing reward magnitude, such that cognitively impaired older adults were significantly more impulsive than healthy controls at the small reward magnitude. The two groups exhibited similar levels of probability discounting, though older adults with MCI were significantly less consistent in their risk preferences. The present findings shed light onto decision-making in pre-dementia disease stages and suggest that discounting performance holds potential to complement early diagnostic instruments, likely due to pathophysiological processes in relevant brain regions.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Delay, probability, and social discounting in a public goods game.

A human social discount function measures the value to a person of a reward to another person at a given social distance. Just as delay discounting is a hyperbolic function of delay, and probability discounting is a hyperbolic function of odds-against, social discounting is a hyperbolic function of social distance. Experiment 1 obtained individual social, delay, and probability discount functio...

متن کامل

کاهش ارزش تأخیری و همبستگی آن با چشم انداز زمان در کارورزان رشته پزشکی

 AbstractIntroduction: Delay discounting (DD) means prefering small immediate rewards to large delayed rewards. This study was to assess delay discounting and the correlation of our findings with that of the Zimbardo Time Perspective Inventory (ZTPI).Method: In a cross-sectional study, DD and time perspective were investigated in 93 medical interns by means of a computer software and ZTPI. In d...

متن کامل

Social Determinants of Delayed Gratification Among American Children

Background: A wide array of Socioeconomic Status (SES) indicators show differential effects for the members of diverse social groups. Researchers know a little about the ethnic variation and the effects of family income on delay discounting which is the predictor of risk behaviors. Objectives: This study examined the effect of family income and its differences on delayed gratification between ...

متن کامل

Comparison of the effectiveness of motivational manipulation and neurofeedback methods on sensitivity to reward, delay discounting and impulsivity in children with attention deficit / hyperactivity disorder

Purpose: The aim of this study was to comparison of the effectiveness of two methods of motivational manipulation and neurofeedback on sensitivity to reward, delay discounting and impulsivity in children with attention deficit / hyperactivity disorder. Methods: The present study was an experimental study with pre-test, post-test, follow-up and control group. The study population consisted of c...

متن کامل

Discounting of monetary rewards that are both delayed and probabilistic: delay and probability combine multiplicatively, not additively.

The value of an outcome is affected both by the delay until its receipt (delay discounting) and by the likelihood of its receipt (probability discounting). Despite being well-described by the same hyperboloid function, delay and probability discounting involve fundamentally different processes, as revealed, for example, by the differential effects of reward amount. Previous research has focused...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists

دوره 29 7  شماره 

صفحات  -

تاریخ انتشار 2014