Kyrsybski has pointed out that signal reactions, instantaneous and
unmediated, if undifferentiated according to the appropriateness of the
situation, reflect immature, impulsive personalities, while the development
of the ability to delay response will permit modified, thoughtful symbol
behavior, a characteristic of the mature person.
好長的句子！感覺應該是被分割了？！
麻煩各位大大幫忙還原成原句！謝謝！

第一和第二個逗點之間是修飾signal reactions的形容詞；第三個逗點隔開if子句，immature和modified後面的逗點都是and隔開兩個形容詞；personalities後面逗點隔開while子句；最後的逗點是symbol behaviour的同位語。