The influence of neoconservatism on US foreign policy debates during the Obama administration

Neoconservatism reached its zenith as a school of thought when it became associated with the Iraq War. Although the war was largely considered a failure, it raised the profile of neoconservatism as a school of thought. Many studies were completed which pointed to the influence of prominent members of the George W. Bush administration who were considered to be ideologically neoconservative. When Obama won the presidency in 2008, it was assumed that the influence of neoconservatives, or neoconservatism more broadly, would be over. However, given neoconservatism’s historical foundations and the tenacity of its adherents it seemed important to consider whether this has been the case. Therefore, this thesis set out to answer the question: To what extent have neoconservatives, and neoconservatism more broadly, influenced foreign policy debates during the Obama administration? I argue that neoconservatism has remained not only salient within foreign policy debates, but prominent in these debates, during Obama’s two terms in office. An examination of US foreign policy towards the nuclear crisis in Iran and the Syrian civil war indicates that neoconservatism had a substantive influence on the policy debates and the options considered within them, particularly in Congress. In some instances, neoconservative policy entrepreneurs contributed to legislation. Furthermore, this thesis finds that neoconservatism has been the predominant approach to foreign policy within the Republican Party on the issues of Iran and Syria during the period under review.

The influence of actions on auditory perception: cognitive and neural mechanisms

It is well known that self-generated stimuli are processed differently from externally generated stimuli. For example, many people have noticed since childhood that it is very difficult to make a self-tickling. In the auditory domain, self-generated sounds elicit smaller brain responses as compared to externally generated sounds, known as the sensory attenuation (SA) effect. SA is manifested in reduced amplitudes of evoked responses as measured through MEEG, decreased firing rates of neurons and a lower level of perceived loudness for self-generated sounds. The predominant explanation for SA is based on the idea that self-generated stimuli are predicted (e.g., the forward model account). It is the nature of their predictability that is crucial for SA. On the contrary, the sensory gating account emphasizes a general suppressive effect of actions on sensory processing, regardless of the predictability of the stimuli. Both accounts have received empirical support, which suggests that both mechanisms may exist. In chapter 2, three behavioural studies concerning the influence of motor activation on auditory perception were presented. Study 1 compared the effect of SA and attention in an auditory detection task and showed that SA was present even when substantial attention was paid to unpredictable stimuli. Study 2 compared the loudness perception of tones generated by others between Chinese and British participants. Compared to externally generated tones, a decrease in perceived loudness for others generated tones was found among Chinese but not among the British. In study 3, partial evidence was found that even when reading words that are related to action, auditory detection performance was impaired. In chapter 3, the classic SA effect of M100 suppression was replicated with MEG in study 4. With time-frequency analysis, a potential neural information processing sequence was found in auditory cortex. Prior to the onset of self-generated tones, there was an increase of oscillatory power in the alpha band. After the stimulus onset, reduced gamma power and alpha/beta phase locking were found. The three temporally segregated oscillatory events correlated with each other and with SA effect, which may be the underlying neural implementation of SA. In chapter 4, a TMS-MEG study was presented investigating the role of the cerebellum in adapting to delayed presentation of self-generated tones (study 5). It demonstrated that in sham stimulation condition, the brain can adapt to the delay (about 100 ms) within 300 trials of learning by showing a significant increase of SA effect in the suppression of M100, but not M200 component. Whereas after stimulating the cerebellum with a suppressive TMS protocol, the adaptation in M100 suppression disappeared and the pattern of M200 suppression reversed to M200 enhancement. These data support the idea that the suppressive effect of actions on auditory processing is a consequence of both motor driven sensory predictions and general sensory gating. The results also demonstrate the importance of neural oscillations in implementing SA effect and the critical role of the cerebellum in learning sensory predictions under sensory perturbation.