Should parents buy cell phones for their children?

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

Performance on vocabulary words:
No of characters: 405.0 444.711560045 91% => OK
No of words: 109.0 116.580246914 93% => 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: 3.71559633028 3.81502700369 97% => OK
Fourth root words length: 3.231146315 3.28032121604 99% => OK
Word Length SD: 1.72457543303 1.8723322822 92% => OK
Unique words: 72.0 76.076318743 95% => More unique words wanted.
Unique words percentage: 0.660550458716 0.655143326166 101% => OK
Syllable count: 132.3 141.574747475 93% => OK
Avg_syllables_per_word: 1.2 1.21358024691 99% => OK

Performance on coherence:
Topic speech coherence ratio: 0.043884680781 0.0738818816272 59% => OK

Acoustic performance on paragraphs:
How many acoustic paragraphs: 5.0 3.20202020202 156% => OK
Average paragraph length: 21.8 60.3232687746 36% => The average paragraph length is low.
STD paragraph length: 21.5814735363 17.3634065801 124% => OK
Average paragraph duration: 9.176 22.9064221017 40% => OK
STD paragraph duration: 8.23643029473 6.49597621602 127% => OK

Acoustic performance on sentences:
How many acoustic sentences: 36.0 31.1548821549 116% => OK
Average acoustic sentence length: 3.02777777778 4.0588447711 75% => OK
STD acoustic sentence length: 2.04784590229 3.18357895611 64% => OK
Average acoustic sentences duration: 1.2 1.46810986539 82% => OK
STD acoustic sentences duration: 0.65903549053 1.01537252472 65% => OK

Acoustic performance on acoustic silence:(An acoustic silence means a little pause between two or more words)
How many acoustic silence: 29.0 28.6644219978 101% => OK
Total acoustic silence duration: 8.15 5.28593714927 154% => It may have a lot of silences or every silence is too long.
Average acoustic silence duration: 0.281034482759 0.187982170178 150% => Maybe the pauses are too long.
STD acoustic silence duration: 0.177207161597 0.154715141812 115% => OK

Acoustic performance on acoustic words:
Total word duration: 33.68 35.408047138 95% => OK
Average word duration: 0.308990825688 0.306236595465 101% => OK
STD word duration: 0.170997853703 0.198589292138 86% => OK

Disfluencies: like hesitations, or 'ehn' or taking a long time to pronounce a word:
How many disfluencies: 7.0 6.3164983165 111% => OK
Total_disfluencies_duration: 5.08 5.14435465769 99% => OK
Total acoustic noise duration: 2.59 2.80480359147 92% => OK

Acoustic rates:
Total speech duration: 45.88 45.0716498316 102% => Need to finish the speech on time.
Compare to expected duration: 1.01955555556 1.00159221848 102% => OK
Rate of silence: 0.6320836966 0.637764685501 99% => OK
Rate of speech: 2.37576285963 2.58495923209 92% => Need to bring more content.
Rate of speech by unique words: 1.56931124673 1.68816559523 93% => More unique words wanted.
Rate of word duration by unique words: 2.1377672209 2.15290372801 99% => OK
Average articulation rates: 0.285371678899 0.343871460585 83% => OK

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Rates: 70.0 out of 100
Scores by speech e-grader: 21.0 Out of 30
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Note: the speech e-grader does NOT examine the meaning of words and ideas.