This joint attention to objects and events fosters early language development.
( ( ( This ( joint attention ) ) ( to ( ( objects and ) events ) ) ) ( ( fosters ( early ( language development ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (JJ joint) (NN attention)) (PP (TO to) (NP (NNS objects) (CC and) (NNS events)))) (VP (VBZ fosters) (NP (JJ early) (NN language) (NN development))) (. .)))
This lack of joint attention will never have any effect on early language development.
( ( ( This lack ) ( of ( joint attention ) ) ) ( ( ( will never ) ( have ( ( any effect ) ( on ( early ( language development ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (NN lack)) (PP (IN of) (NP (JJ joint) (NN attention)))) (VP (MD will) (ADVP (RB never)) (VP (VB have) (NP (NP (DT any) (NN effect)) (PP (IN on) (NP (JJ early) (NN language) (NN development)))))) (. .)))