Should parents buy cell phones for their children?

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

Performance on vocabulary words:
No of characters: 547.0 592.248995984 92% => OK
No of words: 138.0 155.574297189 89% => 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: 3.96376811594 3.80514564318 104% => OK
Fourth root words length: 3.42743929552 3.525876923 97% => OK
Word Length SD: 1.79939369938 1.79077849142 100% => OK
Unique words: 90.0 93.7148594378 96% => OK
Unique words percentage: 0.652173913043 0.604071249207 108% => OK
Syllable count: 168.3 185.844578313 91% => OK
Avg_syllables_per_word: 1.2 1.19417670683 100% => OK

Performance on coherence:
Topic speech coherence ratio: 0.03291927103 0.0650381309087 51% => OK

Acoustic performance on paragraphs:
How many acoustic paragraphs: 5.0 4.35341365462 115% => OK
Average paragraph length: 27.6 68.503853103 40% => The average paragraph length is low.
STD paragraph length: 37.8872010051 21.3332995233 178% => OK
Average paragraph duration: 12.366 25.9943957902 48% => OK
STD paragraph duration: 17.1521877322 7.84667146824 219% => The duration of acoustic paragraphs changes often.

Acoustic performance on sentences:
How many acoustic sentences: 46.0 42.0642570281 109% => OK
Average acoustic sentence length: 3.0 4.02192344571 75% => OK
STD acoustic sentence length: 2.11619017802 3.1217529195 68% => OK
Average acoustic sentences duration: 1.21608695652 1.45093177766 84% => OK
STD acoustic sentences duration: 0.716138431665 0.99851816184 72% => OK

Acoustic performance on acoustic silence:(An acoustic silence means a little pause between two or more words)
How many acoustic silence: 50.0 39.0421686747 128% => It means the content is not pronounced smoothly or it is pronounced slowly. It is word by word.
Total acoustic silence duration: 12.54 7.12997991968 176% => It may have a lot of silences or every silence is too long.
Average acoustic silence duration: 0.2508 0.185688545393 135% => Maybe the pauses are too long.
STD acoustic silence duration: 0.212808270516 0.155154303396 137% => OK

Acoustic performance on acoustic words:
Total word duration: 44.51 47.1480722892 94% => OK
Average word duration: 0.322536231884 0.305395592593 106% => OK
STD word duration: 0.163844489694 0.189427763521 86% => OK

Disfluencies: like hesitations, or 'ehn' or taking a long time to pronounce a word:
How many disfluencies: 9.0 7.94979919679 113% => OK
Total_disfluencies_duration: 6.12 6.2937751004 97% => OK
Total acoustic noise duration: 2.78 3.39508032129 82% => OK

Acoustic rates:
Total speech duration: 61.83 59.7592369478 103% => Need to finish the speech on time.
Compare to expected duration: 1.0305 0.995987282463 103% => OK
Rate of silence: 0.80866893094 0.656000678711 123% => Less acoustic silences wanted.
Rate of speech: 2.23192624939 2.60215298798 86% => Need to bring more content.
Rate of speech by unique words: 1.45560407569 1.56821927147 93% => More unique words wanted.
Rate of word duration by unique words: 2.02201752415 1.99336655568 101% => OK
Average articulation rates: 0.297582137681 0.317803793328 94% => OK

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Rates: 60.0 out of 100
Scores by speech e-grader: 18.0 Out of 30
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Note: the speech e-grader does NOT examine the meaning of words and ideas.