{'fraction_non_alphanumeric': 0.026352288488210817, 'fraction_numerical': 0.0027739251040221915, 'mean_word_length': 5.446428571428571, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Physiological studies of the hyperkinetic child. I.

The authors conducted a three-week controlled, double-blind (methylphenidate-placebo) study of 31 hyperkinetic boys. Response to treatment was judged on the basis of improvement in pretreatment and posttreatment teacher ratings. Pretreatment measures indicated a high arousal state in those children who obtained a poor clinical response to methylphenidate. Changes in indicators of arousal suggested a greater physiological effect from methylphenidate treatment in the low-arousal (good clinical response) group. The authors' data suggest that genetic factors may play a major role in the etiology of this disorder; however, they stress the need for further research.