政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/120818
English  |  正體中文  |  简体中文  |  Post-Print筆數 : 27 |  全文筆數/總筆數 : 113646/144632 (79%)
造訪人次 : 51499063      線上人數 : 591
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 查詢小技巧：
  • 您可在西文檢索詞彙前後加上"雙引號"，以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋，建議至進階搜尋限定作者欄位，可獲得較完整資料
    •  進階搜尋
    政大機構典藏 > 理學院 > 心理學系 > 期刊論文 >  Item 140.119/120818


    請使用永久網址來引用或連結此文件: https://nccur.lib.nccu.edu.tw/handle/140.119/120818


    題名: Effects of d-amphetamine on risk choice in rats depend on the manner in which the expected reward value is varied
    作者: Yang, Jen-Hau
    Cheng, Chung-Ping
    Liao, Ruey-Ming
    廖瑞銘
    貢獻者: 心理系
    關鍵詞: Expected value of reward;Risk-based decision making;Evaluation of riskiness;Psychostimulant drug;T-maze risk choice
    日期: 2018-08
    上傳時間: 2018-11-06 14:52:05 (UTC+8)
    摘要: Decision making related to risks and rewards has been studied in the rodent by using several behavioral tests including the use of probability discounting tasks. However, it still remains unclear how long-term values and the different levels of risk are involved in decisions with reward uncertainty. In this study, we used a T-maze choice task to investigate the role of expected reward values in decision making under risk in the rat. The task was specifically set up to run with the expected value (EV) being equal to 1 between binary choice options (small-and-certain vs. large-but-risky rewards). The tests were carried out by providing three reward ratios that represented different levels of riskiness. Moreover, by varying the reward probabilities, the EV of the large-but risky choice option that was set at either 0.5 or 2 was manipulated to determine whether choice could be influenced by the contrast between unequal EVs. Results demonstrated that the rats were able to distinguish different EVs because they clearly chose the option with a relatively larger EV (2 > 1 and 1 > 0.5). By way of contrast, risk-dependent choice appeared when the EVs were equal; in particular, risk-prone choice was made in a low-risk state, whereas risk-averse choice was made in a high-risk state. The systemic injection of d-amphetamine slightly increased the large-but-risky choices only under the high-risk condition in which the EVs were set to be equal; d-amphetamine did not affect the risk choices in the other two EVs set unequal. Overall, the present results implicate that the contrasts for unequal EVs and the different levels of risk are decision parameters critically involved in the rat`s choice. And, relatively low doses of d-amphetamine did not have much of an effect on the present model of risk choice.
    關聯: PHARMACOLOGY BIOCHEMISTRY AND BEHAVIOR, 171, 20-29
    資料類型: article
    DOI 連結: http://dx.doi.org/10.1016/j.pbb.2018.05.008
    DOI: 10.1016/j.pbb.2018.05.008
    顯示於類別:[心理學系] 期刊論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    2029.pdf1046KbAdobe PDF2474檢視/開啟


    在政大典藏中所有的資料項目都受到原著作權保護.


    社群 sharing

    著作權政策宣告 Copyright Announcement
    1.本網站之數位內容為國立政治大學所收錄之機構典藏，無償提供學術研究與公眾教育等公益性使用，惟仍請適度，合理使用本網站之內容，以尊重著作權人之權益。商業上之利用，則請先取得著作權人之授權。
    The digital content of this website is part of National Chengchi University Institutional Repository. It provides free access to academic research and public education for non-commercial use. Please utilize it in a proper and reasonable manner and respect the rights of copyright owners. For commercial use, please obtain authorization from the copyright owner in advance.

    2.本網站之製作，已盡力防止侵害著作權人之權益，如仍發現本網站之數位內容有侵害著作權人權益情事者，請權利人通知本網站維護人員(nccur@nccu.edu.tw)，維護人員將立即採取移除該數位著作等補救措施。
    NCCU Institutional Repository is made to protect the interests of copyright owners. If you believe that any material on the website infringes copyright, please contact our staff(nccur@nccu.edu.tw). We will remove the work from the repository and investigate your claim.
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回饋