THEOLOGY IN AN EVOLUTIONARY MODE

Abstract. Evolution has become the standard way of understanding the world process. Theology has to express traditional faith in the context of the contemporary world. Since the common world view has profoundly changed, from a static world of being into a dynamic world of becoming, theology needs to change its language and its understanding of the universe as God's creation. This understanding of an evolving world is to be used as a theological source. Such a change of perspective necessitates a fundamental reconstructing of theology; for theology, such reconstructing means a renewed understanding of the Creator and of the Incarnation.     

Performances on ratio and interval schedules of reinforcement: Data and theory

Two differences between ratio and interval performance are well known: (a) Higher rates occur on ratio schedules, and (b) ratio schedules are unable to maintain responding at low rates of reinforcement (ratio “strain”). A third phenomenon, a downturn in response rate at the highest rates of reinforcement, is well documented for ratio schedules and is predicted for interval schedules. Pigeons were exposed to multiple variable-ratio variable-interval schedules in which the intervals generated in the variable-ratio component were programmed in the variable-interval component, thereby “yoking” or approximately matching reinforcement in the two components. The full range of ratio performances was studied, from strained to continuous reinforcement. In addition to the expected phenomena, a new phenomenon was observed: an upturn in variable-interval response rate in the midrange of rates of reinforcement that brought response rates on the two schedules to equality before the downturn at the highest rates of reinforcement. When the average response rate was corrected by eliminating pausing after reinforcement, the downturn in response rate vanished, leaving a strictly monotonic performance curve. This apparent functional independence of the postreinforcement pause and the qualitative shift in response implied by the upturn in variable-interval response rate suggest that theoretical accounts will require thinking of behavior as partitioned among at least three categories, and probably four: postreinforcement activity, other unprogrammed activity, ratio-typical operant behavior, and interval-typical operant behavior.     

Scaling pigeons' choice of feeds: bigger is better.

Preferences of hungry pigeons among 10 grains and pellets were analyzed using a Thurstone scaling procedure. The recovered scales were positively correlated with size of the feed. The correlations improved when the Thurstonian assumption of equal-sized discriminal dispersions (Case V) was replaced with the assumption of proportional-sized dispersions (Case VI), as entailed by Weber's law. The correlations weakened when the experiments were conducted with the pigeons close to their free-feeding weights, where the probability of sampling alternative grains increased. In the final experiment, exposure to a large pellet shifted the preferences between two smaller pellets.     

Biology and a Theology of Evolution

The challenge and stimulus to theology that is constituted by the scientific version of Genesis which will prevail for the foreseeable future is expounded in relation to the significance of the succeeding stages of the life process and to the general features of biological evolution. A responsive theology of evolution is discerned as involving a renewal of insights associated with the themes of immanence, panentheism, the Wisdom and Word of God, and a sacramental universe. Such a revitalized theology allows one to conceive of humanity and Jesus the Christ in a fully evolutionary perspective without loss of an emphasis on the particularity of the Incarnation.     

The Matching Law And Amount-dependent Exponential Discounting As Accounts Of Self-control Choice

Studies with humans have found evidence for amount-dependent temporal discounting, that is, that the sensitivity of choice to reinforcer delay varies inversely with reinforcer magnitude. To test whether similar results could be obtained with nonhumans, pigeons were trained on a two-component concurrent-chains procedure in which the durations of food reinforcement in the terminal links were equal within components but unequal between components. Terminal-link schedules were varied over four conditions to allow separate estimates of sensitivity to delay to be obtained for the large and small reinforcer-magnitude components. Although sensitivity to delay was greater in the small-magnitude component for all subjects, the effect was quite small. The difference in sensitivity was generally less than one standard error, and t tests on parameter differences failed to reach significance. Several models for temporal discounting, including an amount-dependent exponential function, were fitted to the data from the first four conditions. The resulting parameter estimates were used to make predictions for a self-control condition in which one terminal link arranged a smaller, less delayed reinforcer and the other arranged a larger, more delayed reinforcer. For all models, predictions were considerably more accurate when sensitivity to delay was the same regardless of reinforcer magnitude. The results support the independence of delay and magnitude as required by a version of the matching law, and provide strong evidence against amount-dependent exponential discounting as an account of self-control choice. A new two-parameter discounting function, consistent with the matching law, is proposed that has wide empirical generality for both human and nonhuman data.     

Kant: The Audacity of Judgement

In the legal judgement reason demands that it extend itself beyond the mere subjective limits of the self in order that it might fashion a judgement that speaks for the other. This is the universal necessity of the judgement. No claim of truth or the moral law can guarantee that others will agree with this judgement: thus disputation is the risk which reason takes in order to judge at all. The author examines this audacity of judgement by reference to Kant's autonomy of reason, which risks itself in the thought that thinks. This revised version was published online in June 2006 with corrections to the Cover Date.     

The Professional Autonomy of the Medical Doctor in Italy

This contribution deals with the issue of the professional autonomy ofthe medical doctor. Worldwide, the physician's autonomy is guaranteedand limited, first of all, by Codes of Medical Ethics. InItaly, the latest version of the national Code of MedicalEthics (Code 1998) was published in 1998 by the Federation ofprovincial Medical Associations (FnomCeO). The Code 1998acknowledges the physician's autonomy regarding the scheduling, thechoice and application of diagnostic and therapeutic means, within theprinciples of professional responsibility. This responsibility has tomake reference to the following fundamental ethical principles:(1) the protection of human life; (2) the protection of thephysical and psychological health of the human being; (3) therelief from pain; (4) the respect for the freedom and the dignityof the human person, without discrimination; (5) an up-to-datescientific qualification (Art. 5). The authors underline that autonomyis an anthropological – and consequently ethical –characteristic of the human person. Different positions on autonomy inbioethics (individualistic, evolutionistic, utilitarian andpersonalistic models) are explained. The relation between theprofessional autonomy of the physician and the autonomy of the patientand of colleagues is discussed. In fact, the medical doctor isobliged: (1) to respect the fundamental rights of the person,first of all his/her life; (2) to ensure the continuity of thecare, even if he can only relieve the patient's suffering; (3) tomaintain, except under certain circumstances, professional secrecy andconfidentiality regarding patients and their medical records. Moreover,the physician cannot deny the patient correct and appropriateinformation. He/she should not perform any diagnostic or therapeuticactivity without the informed consent of the patient and the medicaldoctor must give up medical treatment in case of documented refusal ofthe individual. Furthermore, the medical doctor has the right to raiseconscientious objections if he/she is requested to perform medicalactions that are contrary to his/her conscience or medical opinion,unless this attitude would seriously and immediately harm the patient.Regarding the relationships with colleagues, the physician is obliged tosolidarity, mutual respect, and care of sick colleagues. Finally, theauthors discuss the Italian legislation affecting the physician'sprofessional autonomy: (1) the SSN health care Acts; (2) theso-called Charter for Public Health Care Services; (3) the Acts onprivacy; (4) Good Clinical Practice.     

The effect of punishment on free-operant choice behavior in humans

During Phase I, three female human subjects pressed a button for monetary reinforcement in five variable-interval schedules specifying different frequencies of reinforcement. On alternate days, responding was also punished (by subtracting money) according to a variable-ratio 34 schedule. In the absence of punishment, response rates conformed to Herrnstein's equation for single variable-interval schedules. Punishment suppressed responding at all frequencies of reinforcement. This was reflected in a change in the values of both constants in Herrnstein's equation: the value of the theoretical maximum response-rate parameter was reduced, and the parameter describing the reinforcement frequency corresponding to the half-maximal response rate was elevated. During Phase II, the same five schedules (A) were in operation (without punishment), but in addition, a concurrent variable-interval schedule (B) of standard reinforcement frequency was introduced. On alternate days, responding in Component B was punished according to a variable-ratio 34 schedule. In the absence of punishment, absolute response rates conformed to equations proposed by Herrnstein to describe performance in concurrent schedules; the ratios of the response rates in the two components and the ratios of the times spent in the two components conformed to the Matching Law. When responding in Component B was punished, response rates in Component B were reduced and those in Component A were elevated, these changes being reflected in distortions of the matching relationship.     

The symmetrical law of effect and the matching relation in choice behavior

In a concurrent-chains procedure, pigeons chose between outcomes that differed in the rate of response-independent delivery of food and electric shocks. The application of functional measurement techniques confirmed the matching relation—between choice and rate of reinforcement value—for two of three pigeons. Scale values of the outcomes were extracted for the two birds that conformed to matching, and the value of a single occurrence of shock per minute—in terms of negative food units—was estimated. A second experiment with concurrent chains provided a test of these parameter estimates. The close correspondence between predicted and obtained choice behavior found in Experiment II indicated that the estimates of outcome value were indeed reliable. Both experiments together support the contention that the effects on choice behavior of positive and aversive stimuli appear to be equal, though opposite in sign.     

专业人员价值取向的现状研究

对8省市的428位专业人员所进行的价值取向研究表明,我国专业人员的价值取向总体倾向是积极向上,与社会期待相符合的,重视社会责任、工作、公众利益、法律规范、感情和家庭的价值;性别、文化程度和年龄等人口统计学因素显著影响专业人员的价值取向的个别侧面,但收入水平、婚姻状况和家庭结构的作用不显著。