Should parents buy cell phones for their children?

Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments

Performance on vocabulary words:
No of characters: 223.0 592.248995984 38% => Need more words or more difficult words.
No of words: 66.0 155.574297189 42% => More words wanted. You may: choose simpler words or speak faster or remove hesitations or remove long pauses, and fully use the time, do NOT save one or two seconds.
Chars per words: 3.37878787879 3.80514564318 89% => OK
Fourth root words length: 2.85026988277 3.525876923 81% => OK
Word Length SD: 1.69460061904 1.79077849142 95% => OK
Unique words: 43.0 93.7148594378 46% => More unique words wanted.
Unique words percentage: 0.651515151515 0.604071249207 108% => OK
Syllable count: 70.2 185.844578313 38% => The syllable count is low.
Avg_syllables_per_word: 1.1 1.19417670683 92% => OK

Performance on coherence:
Topic speech coherence ratio: 0.0273913243114 0.0650381309087 42% => It may have issues on recording quality or the content is not so closely related to content.

Acoustic performance on paragraphs:
How many acoustic paragraphs: 1.0 4.35341365462 23% => Need more acoustic paragraphs.
Average paragraph length: 66.0 68.503853103 96% => OK
STD paragraph length: 0.0 21.3332995233 0% => OK
Average paragraph duration: 37.2 25.9943957902 143% => OK
STD paragraph duration: 0.0 7.84667146824 0% => The duration of acoustic paragraphs keeps same.

Acoustic performance on sentences:
How many acoustic sentences: 18.0 42.0642570281 43% => Need more acoustic sentences. Maybe the speech rate is too fast.
Average acoustic sentence length: 3.66666666667 4.02192344571 91% => OK
STD acoustic sentence length: 2.98142397 3.1217529195 96% => OK
Average acoustic sentences duration: 1.97 1.45093177766 136% => OK
STD acoustic sentences duration: 1.47440006632 0.99851816184 148% => OK

Acoustic performance on acoustic silence:(An acoustic silence means a little pause between two or more words)
How many acoustic silence: 18.0 39.0421686747 46% => OK
Total acoustic silence duration: 2.07 7.12997991968 29% => Still need a very little pause between two words.
Average acoustic silence duration: 0.115 0.185688545393 62% => Maybe the speech rate is too fast.
STD acoustic silence duration: 0.109354164682 0.155154303396 70% => OK

Acoustic performance on acoustic words:
Total word duration: 32.67 47.1480722892 69% => Need to talk more.
Average word duration: 0.495 0.305395592593 162% => OK
STD word duration: 0.458238557694 0.189427763521 242% => It may have hesitations.

Disfluencies: like hesitations, or 'ehn' or taking a long time to pronounce a word:
How many disfluencies: 17.0 7.94979919679 214% => It may have 'ehn' in the speaking, or it has hesitations or overlapping speeches.
Total_disfluencies_duration: 17.36 6.2937751004 276% => Somehow the hesitation is serious.
Total acoustic noise duration: 1.57 3.39508032129 46% => OK

Acoustic rates:
Total speech duration: 37.2 59.7592369478 62% => Talk more. Do not save time. People can talk 4-5 words in one second.
Compare to expected duration: 0.62 0.995987282463 62% => Some seconds left. Need to talk more.
Rate of silence: 0.483870967742 0.656000678711 74% => OK
Rate of speech: 1.77419354839 2.60215298798 68% => Need to bring more content.
Rate of speech by unique words: 1.15591397849 1.56821927147 74% => More unique words wanted.
Rate of word duration by unique words: 1.31619222528 1.99336655568 66% => Need more unique words.
Average articulation rates: 0.359060484848 0.317803793328 113% => OK

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Rates: 58.3333333333 out of 100
Scores by speech e-grader: 17.5 Out of 30
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Note: the speech e-grader does NOT examine the meaning of words and ideas.