Should parents buy cell phones for their children?

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

Performance on vocabulary words:
No of characters: 257.0 444.711560045 58% => Need more words or more difficult words.
No of words: 70.0 116.580246914 60% => 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: 3.67142857143 3.81502700369 96% => OK
Fourth root words length: 2.89250760852 3.28032121604 88% => OK
Word Length SD: 1.83397638691 1.8723322822 98% => OK
Unique words: 48.0 76.076318743 63% => More unique words wanted.
Unique words percentage: 0.685714285714 0.655143326166 105% => OK
Syllable count: 83.7 141.574747475 59% => The syllable count is low.
Avg_syllables_per_word: 1.2 1.21358024691 99% => OK

Performance on coherence:
Topic speech coherence ratio: 0.0 0.0738818816272 0% => 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: 8.0 3.20202020202 250% => Need less acoustic paragraphs.
Average paragraph length: 8.75 60.3232687746 15% => The average paragraph length is low.
STD paragraph length: 7.17199414389 17.3634065801 41% => OK
Average paragraph duration: 5.3 22.9064221017 23% => The speaking content is not well organized.
STD paragraph duration: 4.83731847205 6.49597621602 74% => OK

Acoustic performance on sentences:
How many acoustic sentences: 35.0 31.1548821549 112% => OK
Average acoustic sentence length: 2.0 4.0588447711 49% => OK
STD acoustic sentence length: 1.62128696676 3.18357895611 51% => OK
Average acoustic sentences duration: 0.989142857143 1.46810986539 67% => OK
STD acoustic sentences duration: 0.674182558695 1.01537252472 66% => OK

Acoustic performance on acoustic silence:(An acoustic silence means a little pause between two or more words)
How many acoustic silence: 39.0 28.6644219978 136% => It means the content is not pronounced smoothly or it is pronounced slowly. It is word by word.
Total acoustic silence duration: 9.59 5.28593714927 181% => It may have a lot of silences or every silence is too long.
Average acoustic silence duration: 0.245897435897 0.187982170178 131% => Maybe the pauses are too long.
STD acoustic silence duration: 0.263406850647 0.154715141812 170% => The duration of acoustic silence changes often. It may have hesitations.

Acoustic performance on acoustic words:
Total word duration: 27.87 35.408047138 79% => Need to talk more.
Average word duration: 0.398142857143 0.306236595465 130% => OK
STD word duration: 0.248597740808 0.198589292138 125% => It may have hesitations.

Disfluencies: like hesitations, or 'ehn' or taking a long time to pronounce a word:
How many disfluencies: 14.0 6.3164983165 222% => It may have 'ehn' in the speaking, or it has hesitations or overlapping speeches.
Total_disfluencies_duration: 10.75 5.14435465769 209% => Somehow the hesitation is serious.
Total acoustic noise duration: 3.73 2.80480359147 133% => It may have issues on recording quality or have issues on silences or disfluencies.

Acoustic rates:
Total speech duration: 42.4 45.0716498316 94% => Talk more. Do not save time. People can talk 4-5 words in one second.
Compare to expected duration: 0.942222222222 1.00159221848 94% => OK
Rate of silence: 0.919811320755 0.637764685501 144% => Less acoustic silences wanted.
Rate of speech: 1.65094339623 2.58495923209 64% => Need to bring more content.
Rate of speech by unique words: 1.1320754717 1.68816559523 67% => More unique words wanted.
Rate of word duration by unique words: 1.72228202368 2.15290372801 80% => Need more unique words.
Average articulation rates: 0.336736871429 0.343871460585 98% => OK

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Rates: 50.0 out of 100
Scores by speech e-grader: 15.0 Out of 30
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Note: the speech e-grader does NOT examine the meaning of words and ideas.